_________ you take an active part in physical activity ______ be able to keep fit and stay healthy.

A. Only if; you will                       B. Only if; will you

C. Unless; you will                       D. Unless; will you

 

【答案】

B

【解析】

試題分析：考查倒裝句：句意：只有你積極的參加體育活動，你才能保持健康。Only后面接狀語從句的時候，主句應該用部分倒裝，助動詞will放在主語前面，選B。

考點：考查倒裝句

 

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