题目内容
20.We all know that _____ carefully dealt with,the situation will get worse.( )A. | once | B. | when | C. | if | D. | unless |
分析 我们都知道,如果不小心处理,情况会变得更加糟糕.
解答 答案:D. once一旦,when当…时候,if如果,unless 如果不,除非. 根据句意可知,前面应该是条件状语,表示"如果不小心处理".unless相当于if not,其他选项均不符句意. 所以根据句意选择D.
点评 考查从属连词时要注意选项中的连词的含义,根据句意作出正确选择.
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