Prepositions Time At In On

Respuesta correcta: A) at

• A) atCorrect! 'At' is used with exact clock times, and '9 a.m.' is a precise point in the day.
• B) inNo. 'In' is used with longer periods such as months, years or parts of the day, not with a clock time.
• C) onNo. 'On' is used with days and dates, not with the hour of the day.
• D) forNo. 'For' measures duration, so it would answer for how long rather than at what time.

Respuesta correcta: B) The storm arrived in December and caused damage across the island.

• A) The storm arrived at December and caused damage across the island.No. 'At' is used for clock times and for specific points, not for the name of a month.
• B) The storm arrived in December and caused damage across the island.Correct! Months are long periods, and English uses 'in' before the name of a month.
• C) The storm arrived on December and caused damage across the island.No. 'On' is used with days and dates, so it is not the preposition for a month.
• D) The storm arrived for December and caused damage across the island.No. 'For' would measure the length of time the storm lasted, not the period in which it arrived.

Respuesta correcta: C) on

• A) inNo. 'In' would be correct for the month or the year alone, but not for a full date.
• B) atNo. 'At' is used with clock times and with particular points in space, not with dates.
• C) onCorrect! Full dates take 'on', because a specific day of a specific month is being named.
• D) byNo. 'By' expresses a deadline or a limit, which has no place in this sentence.

Respuesta correcta: D) The library closes early on Sundays during the summer.

• A) The library closes early in Sundays during the summer.No. 'In' is used for months, years and parts of the day, not for a day of the week.
• B) The library closes early at Sundays during the summer.No. 'At' is used with clock times; no hour is named in this sentence.
• C) The library closes early for Sundays during the summer.No. 'For Sundays' would measure duration across several Sundays rather than naming the day.
• D) The library closes early on Sundays during the summer.Correct! Days of the week take 'on' in English, so 'on Sundays' is the correct form.

Respuesta correcta: A) They moved to Arecibo in 2015.

• A) They moved to Arecibo in 2015.Correct! Years are long periods, and English uses 'in' before a year number.
• B) They moved to Arecibo at 2015.No. 'At' is used with clock times and specific points, not with a year.
• C) They moved to Arecibo on 2015.No. 'On' is used with days and dates, not with a bare year.
• D) They moved to Arecibo for 2015.No. 'For' would state how long they stayed, not when the move took place.

Respuesta correcta: B) The shop opens early in the morning and closes late at night.

• A) The shop opens early at the morning and closes late in the night.No. 'At the morning' is not used; 'the morning' needs 'in', though 'at night' takes no article.
• B) The shop opens early in the morning and closes late at night.Correct! 'In' is used with parts of the day such as the morning, while 'at' is used with 'night'.
• C) The shop opens early on the morning and closes late at the night.No. 'On the morning' is not the standard form; English uses 'in the morning'.
• D) The shop opens early of the morning and closes late of the night.No. 'Of' is not a preposition of time and cannot introduce these expressions.

Respuesta correcta: C) on

• A) inNo. 'In' goes with 'the morning' but not with a named day, so 'in Friday' is wrong.
• B) atNo. 'At' is used with clock times, and no hour is given in this phrase.
• C) onCorrect! 'On' is the preposition used with a day of the week, so 'on Friday morning' is correct.
• D) ofNo. 'Of' expresses possession or measurement and never marks the time of an event.

Respuesta correcta: D) We met at the weekend and talked about the trip.

• A) We met in the weekend and talked about the trip.No. 'In the weekend' is not the usual form; the phrase takes 'at'.
• B) We met on the weekend and talked about the trip.No. 'On the weekend' would require a specific day, such as 'on Saturday'.
• C) We met for the weekend and talked about the trip.No. 'For the weekend' would measure duration, which is not what is meant here.
• D) We met at the weekend and talked about the trip.Correct! 'At the weekend' is the standard British and general form, with 'at' marking the occasion as a whole.

Respuesta correcta: A) The festival takes place in June and the main concert happens on Saturday.

• A) The festival takes place in June and the main concert happens on Saturday.Correct! 'In' goes with the month and 'on' goes with the day, so both prepositions are used correctly.
• B) The festival takes place on June and the main concert happens in Saturday.No. 'On June' and 'in Saturday' both reverse the rule for months and days.
• C) The festival takes place at June and the main concert happens on Saturday.No. 'At June' is not used for a month; the month takes 'in'.
• D) The festival takes place in June and the main concert happens at Saturday.No. 'At Saturday' is not used for a day of the week; the day takes 'on'.

Respuesta correcta: B) The workshop lasted two hours and began at four in the afternoon.

• A) The workshop lasted at two hours and began in four in the afternoon.No. 'At two hours' would mark a clock time, but the sentence states a length of two hours, not a point.
• B) The workshop lasted two hours and began at four in the afternoon.Correct! 'For' or the bare plural expresses duration, and 'at' marks the starting point in time.
• C) The workshop lasted in two hours and began at four in the afternoon.No. 'In two hours' would mean 'after two hours have passed', which is a different meaning.
• D) The workshop lasted on two hours and began in four in the afternoon.No. 'On two hours' and 'in four in the afternoon' both use the wrong prepositions for duration and for the afternoon.

Respuesta correcta: C) in

• A) atNo. 'At' is used with exact clock times, and no hour is named here.
• B) onNo. 'On' is used with days and dates, not with a part of a day.
• C) inCorrect! 'In' is used with parts of the day, and 'the middle of the afternoon' is part of a day.
• D) byNo. 'By' would mean no later than that point, which is not the meaning of a forecast.

Respuesta correcta: D) The results will be published on 15 March.

• A) The results will be published in 15 March.No. 'In' is used for a month or a year, but a numbered day needs 'on'.
• B) The results will be published at 15 March.No. 'At' is used with clock times, and a date is not a clock time.
• C) The results will be published for 15 March.No. 'For' would express a purpose or a duration, neither of which applies to a publication date.
• D) The results will be published on 15 March.Correct! Full dates take 'on', so 'on 15 March' is the correct preposition and number combination.

Respuesta correcta: A) The storm was at its worst last night.

• A) The storm was at its worst last night.Correct! 'At night' takes no article and is the standard expression, so 'last night' needs no preposition at all.
• B) The storm was at its worst in last night.No. 'In last night' is not used; 'at night' is the fixed expression with no article.
• C) The storm was at its worst on last night.No. 'On last night' would suggest a specific named night, but 'night' is not a day name here.
• D) The storm was at its worst for last night.No. 'For last night' would measure duration and change the meaning of the sentence.

Respuesta correcta: B) The class starts in August and ends on the last Friday of June.

• A) The class starts at August and ends in the last Friday of June.No. 'At August' is wrong for a month, and 'in the last Friday' is wrong for a named day.
• B) The class starts in August and ends on the last Friday of June.Correct! The month takes 'in' and the named day takes 'on', which is the standard combination.
• C) The class starts on August and ends in the last Friday of June.No. 'On August' is wrong for a month; the month takes 'in'.
• D) The class starts in August and ends in the last Friday of June.No. 'In the last Friday' is wrong because a specific day of the week takes 'on', not 'in'.

Respuesta correcta: C) since

• A) forNo. 'For' measures the length of a period, but it would be followed by a duration such as 'six years', not by a starting year.
• B) inNo. 'In' is used for closed periods such as months and years, but here the period is still open, so 'since' fits.
• C) sinceCorrect! 'Since' marks the starting point of a period that continues up to the present, and a year is such a point.
• D) fromNo. 'From' would need a second element such as 'from 2019 to 2021' to close the period.

Respuesta correcta: D) The repair took three days and cost more than expected.

• A) The repair took in three days and cost more than expected.No. 'In three days' would mean the repair finished within three days, not that it lasted them.
• B) The repair took at three days and cost more than expected.No. 'At three days' would mark a clock time or a point, not a length.
• C) The repair took on three days and cost more than expected.No. 'On three days' would suggest a repeated occasion on three separate days.
• D) The repair took three days and cost more than expected.Correct! After 'took' the length of a period needs no preposition at all, which is the natural form here.

Respuesta correcta: A) The family travels abroad in summer.

• A) The family travels abroad in summer.Correct! 'In' is the preposition used with seasons when they are treated as general periods.
• B) The family travels abroad at summer.No. 'At summer' is not used; seasons take 'in' when no specific date is named.
• C) The family travels abroad on summer.No. 'On summer' would require a named day, such as 'on the first day of summer'.
• D) The family travels abroad for summer.No. 'For summer' would measure the length of the stay, which is a different meaning.

Respuesta correcta: B) Everyone arrived at the ceremony by noon.

• A) Everyone arrived in the ceremony by noon.No. 'In the ceremony' would place someone inside the event, which is not what 'arrived' means here.
• B) Everyone arrived at the ceremony by noon.Correct! 'At' marks a particular occasion or event, and 'by noon' states the deadline on the other preposition.
• C) Everyone arrived on the ceremony by noon.No. 'On the ceremony' would require the ceremony to be a day or a date.
• D) Everyone arrived for the ceremony by noon.No. 'For the ceremony' states a purpose rather than an arrival at an occasion.

Respuesta correcta: C) on, on

• A) in, atNo. 'In' does not go with days of the week, so the first half of the sentence would be wrong.
• B) at, inNo. 'At' does not go with 'Sundays' either; the correct preposition for a day is 'on'.
• C) on, onCorrect! Both are named days of the week, and English uses 'on' with each of them.
• D) for, byNo. 'For' and 'by' do not introduce named days of the week in English.

Respuesta correcta: D) The bus leaves at seven in the morning.

• A) The bus leaves in seven at the morning.No. 'In seven' would mean 'after seven hours have passed', and 'at the morning' is not used.
• B) The bus leaves on seven at the morning.No. 'On seven' would require a date, and no day of the month is named.
• C) The bus leaves for seven at the morning.No. 'For seven' would measure duration and would change the meaning of the sentence.
• D) The bus leaves at seven in the morning.Correct! 'At' marks the clock hour and 'in' marks the part of the day, which is the standard pairing.