题目内容
4.Mom won't let Dick go out ________ he promises to be back by 10:00 tonight.( )| A. | if | B. | when | C. | since | D. | unless |
分析 除非他答应今晚10点前回来,否则妈妈不会让迪克出去的.
解答 答案:D.
本题考查的是从属连词的辨析.根据语境推测句意是"除非他答应今晚10点前回来,否则妈妈不会让迪克出去的."从句意来看,这里需要一个表假设的连词,说明后句是表假设的条件状语从句,结合选项,unless可以引导一个表假设的条件状语从句,意为"除非",相当于if not.故选D.
点评 本题主要考查连词的用法,连词在句子中主要起联系上下文的作用,他们之间的区别就是表示逻辑关系的不同,所以在解题时先要理解上下文含义,然后根据上下文逻辑关系选择合适的连词.连词的用法都比较多,语义之间还有交叉,熟记其基本应用规则,了解其区别,注意固定搭配对象,是做好此类题型的关键.
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