Chuyển các câu chủ động sau thành câu bị động
13.Ann had fed the cats before she went to the cinema.
14.Did the students discuss the pollution problems at school?
15.Have the thieves stolen the most valuable painting in the national museum?
16.How many languages do they speak in Canada?
17.When did you see the man?
13.The cats were fed by Ann before she went to the cinema.
14.Were the pollution discussed problems at school (by the students)?
15.Has the most valuable paiting in the national museum been stolen by the thieves?
16.How many languages are spoken in Canada(by them)?
17.Was the man seen by you?
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Đáp án:
3.The cats were fed by Ann before she went to the cinema.
14.Were the pollution discussed problems at school (by the students)?
15.Has the most valuable paiting in the national museum been stolen by the thieves?
16.How many languages are spoken in Canada(by them)?
17.Was the man seen by you?