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        1. 【題目】I found it no use _______ to persuade him to give up smoking.

          A.TryB.to tryC.tryingD.having tried

          【答案】C

          【解析】

          考查動名詞及其固定用法。句意:我發(fā)現(xiàn)勸他戒煙是沒有用的。find it no use doing sth為固定用法,表示“發(fā)現(xiàn)做某事沒用/只是白費力氣”,由此可以排除AB;這里it做形式賓語,真正的賓語是trying to persuade him to give up smoking這件事情。題目并沒有強(qiáng)調(diào)try這個動作和主句動作find之間的先后順序,所以不需要用完成時態(tài),排除D項。故選C項。

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