题目内容
The windows are believed ________ by Jack.
- A.broken
- B.to be broken
- C.to break
- D.to have been broken
D
解析:
导解:用不定式描述过去动作时要用不定式的完成式.
解析:
导解:用不定式描述过去动作时要用不定式的完成式.

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