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        1. You’ll fail the exam _____ you work hard. 

          A.ifB.unlessC.orD.so

          B

          解析試題分析:句意:除非你努力學(xué)習(xí),不然你考試會失敗。A如果;B除非;C不然,或者;D所以,結(jié)合語境選B。
          考點:考查連詞。

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