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【题目】 It is very good __________________ us to be in good __________________.

A. for;health B. for;healthy

C. in;health D. to;healthy

【答案】A

【解析】句意:保持健康对我们有益。be good for意为"对……有益";be in good health意为"保持健康",均为固定短语,故选A。

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