题目内容

12.You won't lose weight        you go on diet and take exercise regularly.(  )
A.ifB.unlessC.becauseD.so

分析 除非你经常节食和锻炼,否则你是不会减肥的.

解答 答案B.
so表示因果意义的并列连词,并列连词用来连接平行的词、词组和分句.因此可排除D.if"如果",引导条件状语从句.unless"除非,如果不",在意义上相当于if…not,因此在有些场合中unless与if…not可互换使用,引导条件状语从句.because"因为",引导原因状语从句.分析可知前后两句话之间是逻辑上的"条件"关系,可排除C;再结合句子所表达的意思可知答案选B.

点评 本题考查从属连词的用法.连词的用法辨析,要注意分析主从句之间的逻辑关系,再确定相应的连词,同时注意不同的连词的语义及用法区别.

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