The teacher asked the students whether they could tell the name of the man who _ steam engine.
Correct answer: B. Had invented
- A. Had been invented
- B. Had invented
- C. Has been invented
- D. Would be invented
Explanation
B is the correct option because this is active voice and past perfect tense. It correctly indicates that the man performed the action of inventing the steam engine in the past. It fits the context of the sentence, which asks about a historical fact.
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About Active and Passive Voice
Active voice presents the doer as the subject, while passive voice presents the receiver of the action and uses an appropriate form of “be” with the past participle. Questions cover tense changes, modal verbs, omitted agents and sentences that cannot be passivized because they lack a suitable object.
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