Sofia looks after her two younger brothers every Saturday afternoon in Alajuela.
What does the phrasal verb 'look after' mean in this sentence?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)To take care of
💡 Explicación
Sofia does something for her brothers every week, so the phrasal verb describes care given to a person. A learner who confuses it with 'look for' imagines a search; with 'look up to', an emotion of respect; with 'look forward to', an expectation about the future. Only 'take care of' matches a repeated, concrete responsibility inside a Costa Rican family routine.
Ver respuesta
Respuesta correcta: B)To take care of
A)To wait eagerly for'Look forward to' means to wait eagerly for something pleasant, an anticipation rather than an action performed.
B)To take care of'Look after' means to take care of someone, which is exactly what Sofia does for her brothers on Saturday afternoons.
C)To try to find'Look for' means to try to find something or someone, a search that ends once the person is located.
D)To admire and respect'Look up to' means to admire and respect someone, a feeling a student may have for a teacher, not a weekly task.
💡 Explicación
Sofia does something for her brothers every week, so the phrasal verb describes care given to a person. A learner who confuses it with 'look for' imagines a search; with 'look up to', an emotion of respect; with 'look forward to', an expectation about the future. Only 'take care of' matches a repeated, concrete responsibility inside a Costa Rican family routine.
Pregunta 2
Pregunta 2 · D3Bloom: Apply
At the hardware store in Escazu, Andres asked an employee where the paint was kept.
Andres had to ____ the paint on aisle seven, because he could not see it from the entrance.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)look for
💡 Explicación
The context gives the verb slot '____ the paint on aisle seven', and the object is a physical item that has to be located. 'Look for' accepts a thing as its object and describes the act of searching, so it is the only form that fits both the grammar and the scene of a supermarket in Escazu.
Ver respuesta
Respuesta correcta: A)look for
A)look for'Look for' means to search for something, which matches the situation of scanning the aisles for a product.
B)look after'Look after' means to take care of a person or a thing over time, and Andres is not caring for the paint.
C)look up'Look up' means to consult a word in a dictionary or a price on a screen, which is not a search across shelves.
D)look into'Look into' means to investigate a matter in depth, a serious enquiry rather than a quick shop.
💡 Explicación
The context gives the verb slot '____ the paint on aisle seven', and the object is a physical item that has to be located. 'Look for' accepts a thing as its object and describes the act of searching, so it is the only form that fits both the grammar and the scene of a supermarket in Escazu.
Pregunta 3
Pregunta 3 · D4Bloom: Analyze
Before the heavy rain reached Perez Zeledon, the farmers checked how much water the river was carrying.
Which sentence uses the phrasal verb correctly?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)The farmers looked over the river before the storm arrived.
💡 Explicación
A separable phrasal verb such as 'look over' keeps its order when the object is a noun, but allows the noun to sit between the two parts. The question asks the learner to separate a well-formed sentence from three defective ones, which is a higher-level analysis than recognising the meaning of the idiom.
Ver respuesta
Respuesta correcta: C)The farmers looked over the river before the storm arrived.
A)The farmers looked the river over wrong place.A misplaced adverb turns the sentence into a string of words that no speaker of English would produce.
B)The farmers over looked the river before the storm arrived.The adverb cannot open the phrasal verb, because the fixed order is verb plus adverb before the particle and the object.
C)The farmers looked over the river before the storm arrived.'Look over' means to examine or inspect something, and the separable phrasal verb places the short object between the two parts when there is no pronoun.
D)The farmers looked over the river, and then it dried up in an hour.A river cannot dry up in an hour, so the second sentence describes an impossible result and adds no grammatical failure of its own.
💡 Explicación
A separable phrasal verb such as 'look over' keeps its order when the object is a noun, but allows the noun to sit between the two parts. The question asks the learner to separate a well-formed sentence from three defective ones, which is a higher-level analysis than recognising the meaning of the idiom.
Pregunta 4
Pregunta 4 · D4Bloom: Apply
Lucia's flight from SJO was delayed, so she has not decided yet whether to travel tomorrow.
Lucia is still ____ whether to travel to Manchester tomorrow morning.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)looking into
💡 Explicación
The phrase 'whether to travel' names a question that is still open, so the verb must express investigation rather than pleasure or admiration. 'Look into' collocates with exactly this kind of undecided matter, and it is the form Costa Rican students need for examining options before committing.
Ver respuesta
Respuesta correcta: B)looking into
A)looking up to'Looking up to' means to admire someone, a feeling that cannot be followed by the word 'whether' in this construction.
B)looking into'Looking into' means to investigate a matter or consider it in detail, which matches a decision still under examination.
C)looking forward to'Looking forward to' expresses pleasure about something already arranged, and Lucia has not booked anything yet.
D)looking after'Looking after' means to take care of someone or something, a responsibility rather than a decision about her own trip.
💡 Explicación
The phrase 'whether to travel' names a question that is still open, so the verb must express investigation rather than pleasure or admiration. 'Look into' collocates with exactly this kind of undecided matter, and it is the form Costa Rican students need for examining options before committing.
Pregunta 5
Pregunta 5 · D4Bloom: Understand
After the earthquake, engineers walked through the damage in the town of Siesores.
What does the phrasal verb 'walk through' mean here?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)To examine or explain something step by step
💡 Explicación
'Walk through' is used for both physical inspection and careful explanation. The earthquake report fits the first sense: the engineers examined the damage step by step. Recognising the phrase in a news-like context is a reading skill as much as a vocabulary skill.
Ver respuesta
Respuesta correcta: B)To examine or explain something step by step
A)To move slowly because of an injuryMoving slowly from pain is described by other verbs, and the report says nothing about an injury.
B)To examine or explain something step by step'Walk through' means to examine or explain something in detail, stage by stage, which is what the engineers did with the damage.
C)To walk past something without stopping'Walk past' means to go by something without stopping, and stopping to inspect every room is the opposite of that.
D)To refuse to discuss a topic'Refuse to discuss' would be expressed with a verb of refusal, and inspection requires attention rather than avoidance.
💡 Explicación
'Walk through' is used for both physical inspection and careful explanation. The earthquake report fits the first sense: the engineers examined the damage step by step. Recognising the phrase in a news-like context is a reading skill as much as a vocabulary skill.
Pregunta 6
Pregunta 6 · D5Bloom: Analyze
Two students disagree about the phrase 'to give up'.
What does 'She gave up smoking last March' mean?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)She stopped the habit
💡 Explicación
The pattern 'give up plus gerund' is fixed: it always describes the end of an activity, usually one repeated over time. Reading it as three separate words is the usual error for Spanish speakers, because the noun 'give' and the adverb 'up' each exist on their own.
Ver respuesta
Respuesta correcta: A)She stopped the habit
A)She stopped the habit'Give up' followed by a gerund means to stop doing something permanently, and 'smoking' names the habit that ended.
B)She handed something to another person'Give' means to hand something to a person, but 'up' removes that reading and turns the phrase into an idiom.
C)She surrendered a position in an argument'Gave up' can mean to surrender in a competition, yet here the object is a gerund that names a habit, not a position.
D)She made someone else stopThe subject is the person who stopped, so the action is not transferred to somebody else.
💡 Explicación
The pattern 'give up plus gerund' is fixed: it always describes the end of an activity, usually one repeated over time. Reading it as three separate words is the usual error for Spanish speakers, because the noun 'give' and the adverb 'up' each exist on their own.
Pregunta 7
Pregunta 7 · D5Bloom: Apply
The battery of the tour bus died, so the driver had to make a decision quickly.
The driver had to ____ twice before the tour could continue.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)call it off
💡 Explicación
Phrasal verbs are fixed combinations, not free combinations, so only one of these four forms exists in English. 'Call it off' is the standard collocation for cancelling a plan, and the dead battery in the context forces that meaning.
Ver respuesta
Respuesta correcta: C)call it off
A)call it in'Call in' means to visit or telephone someone officially, as a doctor calls in on a patient, not to cancel a tour.
B)call it over'Call it over' is not an idiom in English and would confuse a learner who builds phrases from separate verbs.
C)call it off'Call it off' means to cancel or stop something, and a dead battery forced the cancellation of the tour.
D)call it up'Call it up' is not a standard English phrasal verb, so it cannot express a decision about a trip.
💡 Explicación
Phrasal verbs are fixed combinations, not free combinations, so only one of these four forms exists in English. 'Call it off' is the standard collocation for cancelling a plan, and the dead battery in the context forces that meaning.
Pregunta 8
Pregunta 8 · D5Bloom: Analyze
A report about coffee exports in the Central Valley states that small growers turned to organic methods.
Why did the growers ____ organic certification?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)To meet the requirements of markets that pay more for certified beans
💡 Explicación
'Turn to' plus a noun means to begin doing or using something new, and here the new thing is a certification scheme. Distractors built from other phrasal verbs such as 'turn down', 'turn off' or 'turn in' are common traps, because the particle decides the meaning entirely.
Ver respuesta
Respuesta correcta: D)To meet the requirements of markets that pay more for certified beans
A)To avoid reading about export rulesTurning to a certification involves learning new rules rather than avoiding them, so 'turn down' cannot fit.
B)To stop using machines in the drying patioThe context says nothing about machinery, and organic drying beds are a separate discussion.
C)To reduce the number of workers on the farmNo mention is made of the workforce, and certification normally requires more careful record keeping, not fewer staff.
D)To meet the requirements of markets that pay more for certified beansTurning to organic certification changes what the farm must do to keep a certification that buyers reward, which is the reason named in the question.
💡 Explicación
'Turn to' plus a noun means to begin doing or using something new, and here the new thing is a certification scheme. Distractors built from other phrasal verbs such as 'turn down', 'turn off' or 'turn in' are common traps, because the particle decides the meaning entirely.
Pregunta 9
Pregunta 9 · D5Bloom: Evaluate
Maria is preparing a presentation about renewable energy for her school in Heredia.
Which sentence uses a phrasal verb that fits the situation?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)Maria has to come up with an idea for the presentation.
💡 Explicación
Four phrasal verbs built from the same verb and nearly the same particle separate students who know the particle from those who do not. 'Come up with' is the productive one for ideas, and it is essential for academic work such as planning a school presentation.
Ver respuesta
Respuesta correcta: B)Maria has to come up with an idea for the presentation.
A)Maria has to come out an idea for the presentation.'Come out' refers to a result or a launch, and it does not combine with 'an idea' in this sense.
B)Maria has to come up with an idea for the presentation.'Come up with' means to produce an idea or a plan, which is what Maria must do before the presentation.
C)Maria has to come across a good idea for the presentation.'Come across' means to meet or find something by chance, and her idea will be deliberate, not accidental.
D)Maria has to come over an idea for the presentation.'Come over' means to visit or to move across, and it does not accept an idea as the thing that is produced.
💡 Explicación
Four phrasal verbs built from the same verb and nearly the same particle separate students who know the particle from those who do not. 'Come up with' is the productive one for ideas, and it is essential for academic work such as planning a school presentation.
Pregunta 10
Pregunta 10 · D5Bloom: Understand
The airline told passengers to report to gate 12 two hours before takeoff.
What does 'to report to' mean in this announcement?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)To go and present oneself at a place
💡 Explicación
The same spelling covers a noun, a reporting verb and this movement verb, so the object after the particle decides the reading. A place such as a gate tells the learner that the phrase describes an action performed by a person, not a document.
Ver respuesta
Respuesta correcta: C)To go and present oneself at a place
A)To tell a story again'Recount' means to tell something again, and that verb has a different pattern.
B)To repair a broken objectRepair is expressed by other verbs such as 'fix' or 'mend', and no repair appears in the announcement.
C)To go and present oneself at a place'Report to a place' means to go and present oneself there as instructed, which is the meaning in a gate announcement.
D)To write a report about an event'Report' as a noun names a written account of facts, but the verb followed by a place means arrival.
💡 Explicación
The same spelling covers a noun, a reporting verb and this movement verb, so the object after the particle decides the reading. A place such as a gate tells the learner that the phrase describes an action performed by a person, not a document.
Pregunta 11
Pregunta 11 · D6Bloom: Analyze
The teacher explained the new exam rules twice and then asked the class to repeat the instructions.
What does 'to spell out' mean?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)To explain something slowly and in detail
💡 Explicación
'Spell out' shares a spelling with the classroom activity of writing words, but as a phrasal verb about ideas it means to make every step explicit. Costa Rican students often meet the phrase in official notices, where a long instruction is spelled out so nobody misses a requirement.
Ver respuesta
Respuesta correcta: A)To explain something slowly and in detail
A)To explain something slowly and in detail'Spell out' an idea means to explain it clearly, item by item, which is what the teacher did with the rules.
B)To write words with a penThe literal sense of writing letters exists, but the phrasal verb in an explanation context means detailed clarification.
C)To count the letters in a wordCounting letters is called counting or spelling out as a school exercise, not explaining something to a class.
D)To translate a text into a dictionaryExplaining step by step is not the same as giving a translation, and the context describes a spoken briefing.
💡 Explicación
'Spell out' shares a spelling with the classroom activity of writing words, but as a phrasal verb about ideas it means to make every step explicit. Costa Rican students often meet the phrase in official notices, where a long instruction is spelled out so nobody misses a requirement.
Pregunta 12
Pregunta 12 · D6Bloom: Apply
Heavy rain cut the main road, so the bus could not pass through the usual tunnel.
The driver had to ____ the tunnel and take the old mountain road instead.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)get by
💡 Explicación
Phrasal verbs with 'get' cover movement, position and change of state, so the object after the particle is what disambiguates them. Here the object is a route feature that must be bypassed, which selects 'get by' and rules out the three other verbs.
Ver respuesta
Respuesta correcta: D)get by
A)get over'Get over' a physical obstacle such as a fallen tree describes climbing across it, and a whole tunnel is not that kind of obstacle.
B)get in'Get in' means to enter a vehicle or a room, a movement the driver explicitly could not do.
C)get up'Get up' means to rise from a seat or to climb upwards, neither of which the context describes.
D)get by'Get by' a place means to move past it while it remains closed, which is what the driver did.
💡 Explicación
Phrasal verbs with 'get' cover movement, position and change of state, so the object after the particle is what disambiguates them. Here the object is a route feature that must be bypassed, which selects 'get by' and rules out the three other verbs.
Pregunta 13
Pregunta 13 · D6Bloom: Evaluate
A family in Cartago plans to install solar panels on the roof of their house.
Which sentence is correct?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)The family decided to put up solar panels on the roof.
💡 Explicación
The rule learners must apply is not that particles never move, but that a short noun may sit between the parts of a separable phrasal verb while a pronoun may not. In Question 13 the object is a short noun, so 'put up' stays intact and only the other three sentences fail.
Ver respuesta
Respuesta correcta: A)The family decided to put up solar panels on the roof.
A)The family decided to put up solar panels on the roof.With the short noun 'panels', the separable phrasal verb 'put up' keeps its normal order, so this sentence is well formed.
B)The family decided to put on up solar panels on the roof.The particle cannot follow the whole noun phrase here, so this order is not acceptable in standard English.
C)The family decided to put out solar panels on the roof.'Put out' means to extinguish a fire or to publish something, neither of which applies to installing equipment.
D)The family decided to put away up solar panels on the roof.'Put away' means to store something, and it cannot be split by an adverb in this pattern.
💡 Explicación
The rule learners must apply is not that particles never move, but that a short noun may sit between the parts of a separable phrasal verb while a pronoun may not. In Question 13 the object is a short noun, so 'put up' stays intact and only the other three sentences fail.
Pregunta 14
Pregunta 14 · D6Bloom: Analyze
A newspaper article explains that the new law will make it harder for small hotels to operate.
What does the phrase 'to put forward a proposal' mean?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)To present a suggestion for others to consider
💡 Explicación
News English uses 'put forward' constantly when reporting what a minister, a committee or a community group has proposed. The test question offers three distractors built from other senses of the same verb, which trains the learner to read the particle as the meaning carrier.
Ver respuesta
Respuesta correcta: B)To present a suggestion for others to consider
A)To postpone a proposal to a later date'Put off' is the verb that means to postpone, and it is a different phrase from 'put forward'.
B)To present a suggestion for others to consider'Put forward' a proposal means to present it officially so that it can be discussed, which fits an article about a new law.
C)To move a heavy object towards a doorThe literal sense of pushing a thing forward does not describe a written or spoken suggestion.
D)To pay a deposit before staying at a hotelPaying a deposit uses the verb 'pay', and the context says nothing about money for a hotel.
💡 Explicación
News English uses 'put forward' constantly when reporting what a minister, a committee or a community group has proposed. The test question offers three distractors built from other senses of the same verb, which trains the learner to read the particle as the meaning carrier.
Pregunta 15
Pregunta 15 · D6Bloom: Understand
The mechanic told the driver that the tyre would not last the trip to Puntarenas.
What does 'to run out of' mean in that sentence?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)To use something until none is left
💡 Explicación
'Run out of' is one of the most frequent phrasal verbs in daily English: time runs out, money runs out, patience runs out. The mechanic's warning uses it with a physical resource, and that is the reading the distractors try to hide.
Ver respuesta
Respuesta correcta: A)To use something until none is left
A)To use something until none is left'Run out of' a resource means to reach the point where none remains, which is the situation of a tyre losing its tread.
B)To escape from a place quickly'Run away' describes leaving quickly to escape, usually out of fear, and nothing suggests that here.
C)To discover a hidden objectFinding something hidden uses 'find' or 'come across', not this phrase.
D)To flow slowly out of a containerA slow leak is described as leaking or bleeding, and the mechanic is warning about an exhausted resource.
💡 Explicación
'Run out of' is one of the most frequent phrasal verbs in daily English: time runs out, money runs out, patience runs out. The mechanic's warning uses it with a physical resource, and that is the reading the distractors try to hide.
Pregunta 16
Pregunta 16 · D7Bloom: Analyze
A student tells her teacher that she will not be able to submit the essay on Friday.
What does 'to hand in' mean here?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)To give a piece of work to the person who asked for it
💡 Explicación
'Hand in' is the standard British and international academic verb for submitting work, and Costa Rican students meet the American 'turn in' and the Latin American 'entregar' as equivalents. The particle 'in' signals that the work reaches the person who will evaluate it.
Ver respuesta
Respuesta correcta: D)To give a piece of work to the person who asked for it
A)To raise a hand in classRaising a hand is described by 'raise', and the two verbs simply share a spelling.
B)To steal someone's work'Hand in' never means stealing; the opposite of copying is described with other verbs.
C)To refuse to start the workRefusing to begin is described with 'refuse to' plus an infinitive, not with 'hand in'.
D)To give a piece of work to the person who asked for it'Hand in' means to deliver work to a teacher, editor or office, which is the action the student cannot perform on Friday.
💡 Explicación
'Hand in' is the standard British and international academic verb for submitting work, and Costa Rican students meet the American 'turn in' and the Latin American 'entregar' as equivalents. The particle 'in' signals that the work reaches the person who will evaluate it.
Pregunta 17
Pregunta 17 · D7Bloom: Evaluate
A photograph of the flooded street appeared in the national newspaper.
Which sentence uses the phrasal verb in the same way as 'The flood forced thousands of families out of their homes'?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)The storm blew the roof off a barn in Santa Cruz.
💡 Explicación
Comparing two idiomatic uses asks the learner to notice a shared sense of removal rather than a shared verb. 'Force out' and 'blow off' both detach something from where it normally sits, and the three distractors reuse the same verb with particles that carry different senses.
Ver respuesta
Respuesta correcta: C)The storm blew the roof off a barn in Santa Cruz.
A)The storm blew away a day in Santa Cruz.'Blow away' can mean to scatter with the wind or, figuratively, to ignore a person, and neither matches a roof being detached.
B)The storm blew up a barn in Santa Cruz.'Blow up' means to explode or to inflate, which is not what happens to a roof in a storm.
C)The storm blew the roof off a barn in Santa Cruz.'Blow off' means to force something away from a surface, the same removal sense as 'forced out' in the model sentence.
D)The storm blew about a barn in Santa Cruz.'Blow about' means to move in the wind, which describes nothing being removed from a place.
💡 Explicación
Comparing two idiomatic uses asks the learner to notice a shared sense of removal rather than a shared verb. 'Force out' and 'blow off' both detach something from where it normally sits, and the three distractors reuse the same verb with particles that carry different senses.
Pregunta 18
Pregunta 18 · D7Bloom: Analyze
Two technicians are comparing their notes on the broken cable outside the school.
Which pair of sentences agrees in meaning?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)The fault has to be found out and the cause must be looked into.
💡 Explicación
Phrasal verbs in the passive behave like ordinary participles plus particles, so 'find out' becomes 'is found out'. The exercise contrasts two sound passives with two errors that Spanish speakers produce when they transfer the active word order into the passive.
Ver respuesta
Respuesta correcta: D)The fault has to be found out and the cause must be looked into.
A)The fault has to be found and the cause must be looked.A passive needs the auxiliary 'be' plus a participle, and the second sentence is missing it.
B)The fault has to be found out and the cause must look into.'Cause' is the subject, so it cannot act as the auxiliary that 'look into' requires.
C)The fault has to find out and the cause must be looked into.The fault cannot be the grammatical subject of the active verb 'find out', since a fault does not find anything.
D)The fault has to be found out and the cause must be looked into.Both passives place the particle after the participle, which is the correct form when the subject is a thing such as a fault.
💡 Explicación
Phrasal verbs in the passive behave like ordinary participles plus particles, so 'find out' becomes 'is found out'. The exercise contrasts two sound passives with two errors that Spanish speakers produce when they transfer the active word order into the passive.
Pregunta 19
Pregunta 19 · D7Bloom: Evaluate
A documentary explains how land on the Nicoya peninsula was taken for a plantation in the nineteenth century.
What does the expression 'to take over' mean in that context?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)To gain control of something that belonged to another person
💡 Explicación
'Take over' carries a clear sense of power over something that belonged to another party, which is why it appears in news about land, companies or governments. Recognising the ownership element separates it from the many other senses of the verb 'take'.
Ver respuesta
Respuesta correcta: C)To gain control of something that belonged to another person
A)To repeat a story that someone told beforeTelling a story again is described by 'retell', and no repetition appears in the documentary summary.
B)To move a company to a new countryRelocating a company is described by 'relocate', and the context concerns land, not a firm.
C)To gain control of something that belonged to another person'Take over' means to assume control of something owned or managed by someone else, which describes the seizure of land.
D)To lift an object carefully with both handsLifting an object uses verbs such as 'pick up' or 'lift', with no idea of ownership.
💡 Explicación
'Take over' carries a clear sense of power over something that belonged to another party, which is why it appears in news about land, companies or governments. Recognising the ownership element separates it from the many other senses of the verb 'take'.
Pregunta 20
Pregunta 20 · D7Bloom: Evaluate
A tourism board report explains why the country needs better signs and trained guides.
The report argues that the country should ____ the service it offers to foreign visitors.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)step up
💡 Explicación
Only one of these four particles names a change of level, and that is the sense a policy report needs when it argues for better services. The distractor set isolates the particle, which is the part a learner must learn together with the verb.
Ver respuesta
Respuesta correcta: D)step up
A)step in'Step in' means to intervene in a situation, an action by a person rather than an increase in a standard.
B)step out'Step out' means to leave a place or to reduce one's involvement in a conversation.
C)step off'Step off' means to step down from a platform or to move off a path, neither of which matches the proposal.
D)step up'Step up' means to increase something in quality or quantity, and the report proposes a better service for visitors.
💡 Explicación
Only one of these four particles names a change of level, and that is the sense a policy report needs when it argues for better services. The distractor set isolates the particle, which is the part a learner must learn together with the verb.
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