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        1. It is known to all that         you exercise regularly , you won’t keep good health .

              A.unless         B.whenever       C.a(chǎn)lthough       D.if

          解析:此題考查了連詞的用法。unless相當(dāng)于if …not,引導(dǎo)條件狀語(yǔ)從句。其他選項(xiàng)均不含否定的假設(shè),用于此處都不合適。

           

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