A. 句子中，如果主语是动作的执行者，动词就用主动语态。 B. 句子中，如果主语是动作的目标或承受者，动词用被动语态。 C. 主动语态的句子都可以改变成被动语态。 D. 当我们要强调动作承受者，不必说出执行者时，多用被动语态。
A. was built B. built C. has been built D. had been built
A. is washed; is lasted B. washes; lasts C. washes; is lasted D. is washed; lasts
A. are wanting; am coming B. are being wanted; come C. are wanted; will come D. are wanted; am coming
A. That is hoped B. It is hoped C. That hopes D. It hopes
A. was being cleaned B. was being cleaning C. was cleaned D. has been cleaned
A. to be answered B. to answer C. to be answering D. for answer
A. 主动语态 B. 被动语态 C. 完成时态 D. 将来时态
A. 对 B. 错
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