Passive to active: past perfect (had been + past participle -> had + past participle)

1. A.
   She has already prepared pudding.
2. B.
   She had already prepared pudding.
3. C.
   She have already prepared pudding.
4. D.
   She will prepare pudding.

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1. A.
   Mr. Gupta had not posted the article.
2. B.
   Mr. Gupta has not posted the article.
3. C.
   Mr. Gupta have not been posted the article.
4. D.
   Mr. Gupta still had not posted the article.

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1. A.
   The assistant submits the documents before the deadline.
2. B.
   The assistant had submitted the documents before the deadline.
3. C.
   The assistant was submitting the documents before the deadline.
4. D.
   The assistant is submitting the documents before the deadline.

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1. A.
   The visitor parks the car in front of the gate.
2. B.
   The visitor had parked the car in front of the gate.
3. C.
   The car was being parked in front of the gate by the visitor.
4. D.
   The visitor will park the car in front of the gate.

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