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17.Work harder,________you will not keep up with others.(  )
A.and/B.orC.so

分析 努力工作,否则你将落后于其他人.

解答 答案:B.根据语境以及上下文,本题考查的是连词的用法.根据选项的意思,A选项的意思是"和、又",表示并列关系;B选项的意思是"否则",表示相反的假设;C选项的意思是"因此",表示因果关系;此外,根据句意"努力工作,…你将落后于其他人."可知,应该使用or来表示相反的假设,表示否则,要不然.故选B.

点评 做这种题时,首先要根据语境及上下文确定考察范围--连词;其次根据句意确定连词;再次根据选项中的连词即可确定答案.

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