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        1. It’s widely known that you won’t achieve success _____ you work hard.

          A.unlessB.whetherC.ifD.until

          A

          解析試題分析:unless除非,whether是否,if如果,是否,until直到。it’s widely known that眾所周知。句意:眾所周知,除非你努力工作否則你不會取得成功。故選A。
          考點(diǎn):考查連詞的用法。

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