Passive Voice

Respuesta correcta: C) is grown

• A) growsIncorrect. Coffee doesn't grow itself; it is grown by people.
• B) are grownIncorrect. "Coffee" is uncountable and takes "is".
• C) is grownCorrect! Present passive: am/is/are + past participle.
• D) is growIncorrect. We need the past participle "grown".

Respuesta correcta: C) was built

• A) builtIncorrect. This is active voice past simple.
• B) was buildIncorrect. We need the past participle "built".
• C) was builtCorrect! Past passive: was/were + past participle.
• D) were builtIncorrect. "The cathedral" is singular.

Respuesta correcta: A) by

• A) byIn the passive, 'by' introduces the agent, the person who did the writing.
• B) for'Written for' would mean the novel was made on behalf of someone; the sentence needs the agent of the writing.
• C) from'Written from' would mean the novel was adapted from a source, which is not stated.
• D) with'Written with' would mean the novel was produced using something, not who wrote it.

Respuesta correcta: D) is made

• A) make'Make' is the active form and would need the makers as the subject.
• B) are made'Are made' would need a plural subject, but 'every smartphone' is singular.
• C) made'Made' alone has no auxiliary, so it cannot complete the verb phrase.
• D) is madeThe subject 'every smartphone' is singular, so the present passive takes 'is made'.

Respuesta correcta: A) are cleaned

• A) are cleaned'The windows' is plural and the original is in the present, so the passive is 'are cleaned'.
• B) is cleaned'Is cleaned' would be correct only with a singular subject, and 'the windows' is plural.
• C) were cleaned'Were cleaned' would mean the cleaning happened in the past, but the active sentence is in the present.
• D) clean'Clean' is the active verb and would need 'they' as the subject.

Respuesta correcta: D) was discovered

• A) discoveredIncorrect. Active voice would need a subject like "Columbus discovered America".
• B) is discoveredIncorrect. It happened in the past.
• C) were discoveredIncorrect. America is singular.
• D) was discoveredCorrect! Past passive for a historical event.

Respuesta correcta: C) are not shown

• A) aren't showIncorrect. Needs past participle.
• B) weren't shownIncorrect. "Yet" implies present perfect or present relevance.
• C) are not shownCorrect! Present passive negative.
• D) don't shownIncorrect. Passive needs "to be".

Respuesta correcta: B) Because we don't know who performed the action.

• A) Because the bike is the person doing the action.The bike is the thing stolen, not the person doing the action.
• B) Because we don't know who performed the action.The passive is used here precisely because the thief is unknown or unimportant to the story.
• C) To make the sentence sound more polite.Politeness is not the reason; the sentence reports a theft, and the passive keeps attention on the victim.
• D) Because it's a happy event.Having your bike stolen is not a happy event, so the choice has nothing to do with tone.

Respuesta correcta: A) Was / filmed

• A) Was / filmedA passive yes/no question is formed with 'Was/Were' plus the subject plus the past participle.
• B) Did / filmed'Did... filmed' mixes the auxiliary 'did' with a past participle, which is an active question and also wrong in form.
• C) Were / film'Were' would need a plural subject, and 'film' must be the past participle 'filmed'.
• D) Is / filming'Is filming' is the present continuous, and the question is about a completed production.

Respuesta correcta: D) was wrote

• A) were analyzed'Were analyzed' is correct: 'the results' is plural and 'analyzed' is the right participle.
• B) it was presented'It was presented' is the correct passive form with 'presented' as the past participle.
• C) last Tuesday'Last Tuesday' is a correct time expression and belongs at the end of the sentence.
• D) was wroteThe passive needs the past participle, and the past participle of 'write' is 'written', not 'wrote'.

Respuesta correcta: C) The local bank was robbed early this morning; the suspects are still at large.

• A) Someone robbed the local bank this morning.Naming 'someone' as the doer is exactly what a formal report avoids, because the agent is not yet established.
• B) A bank was being broken by some guys.'A bank was being broken by some guys' is clumsy, and 'guys' is far too informal for a report.
• C) The local bank was robbed early this morning; the suspects are still at large.The passive foregrounds the bank and the event while keeping the suspects unnamed, which is the neutral register of a news report.
• D) The bank has been gone by thieves.'The bank has been gone by thieves' is illogical, since thieves remove things from a place rather than taking the place away.

Respuesta correcta: D) Human actions result in significant harm to marine life through plastic waste.

• A) Animals are throwing plastic to the humans.Incorrect. Misinterprets the passive agent.
• B) Plastic is a healthy food for many ocean species.Incorrect. Contradicts the text.
• C) Scientists are not interested in the ocean anymore.Incorrect. Not mentioned.
• D) Human actions result in significant harm to marine life through plastic waste.Correct! It captures the cause and effect described in the passive voice sentences.