_________ 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(dòng)，你才能保持健康。Only后面接狀語(yǔ)從句的時(shí)候，主句應(yīng)該用部分倒裝，助動(dòng)詞will放在主語(yǔ)前面，選B。

考點(diǎn)：考查倒裝句

 

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