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7.It's no use ______ about it.You can't do anything to change it.(  )
A.worriedB.to worryC.worryingD.worry

分析 为此担心是没有用的.你无法做任何事件来改变它.

解答 答案是C.本题考查动名词做主语的固定句型.It's no using doing sth表示"做…是没有用的",其中It 是形式主语,真正的主语是动名词;由此判断答案是C.

点评 对于非谓语动词的选择,首先要根据句子的结构判断句中缺少的是谓语动词还是非谓语动词;如果是非谓语动词,在理解非谓语动词的基本用法的基础上再根据句子的结构做出判断.

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