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英语问题请将下列句子翻译成中文,并选出正确答案,同时说明理由 ,谢谢!1、He has never been afrai

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英语问题
请将下列句子翻译成中文,并选出正确答案,同时说明理由 ,谢谢!
1、He has never been afraid to_____his opinions.
A.imagine B.expect C.discuss D.express
2、Mary ____sweep the floor this morning.
A.was seen to B.was seen C.saw D.saw to
3、He got up late and failed____the early train.
A.catch B.to catch C.catching D.catched
1.D 表达自己的观点
2.A sweep用的是原形,排除B和C(see sb doing sth)
此处表被动,Mary是被看见,be seen to do sth
3.B fail to do sth/fail in doing sth固定短语