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3.-Do you often exercise after work?
-Yes,we do.It's good                our health.(  )
A.atB.inC.forD.with

分析 --下班之后你们会去运动吗?
--会的.那样对健康有益.

解答 答案:C,考察介词辨析.be good for意思是"对…有好处",从句意看应该选for,表示"对健康有好处";be good at译为"擅长",此外be good一般不与in和with搭配,所以选择C.

点评 考察介词短语辨析,此类题目应该通过分析题目意思进行选择,并且应该对固定搭配的短语进行记忆,以便确定最佳答案.

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