题目内容
13.The wooden house will gradually rot away ______ it is constantly smoked by cooking fire.( )A. | unless | B. | if | C. | though | D. | while |
分析 木房子将逐渐腐烂,除非它不断地被做饭的火产生的烟来熏.
解答 答案A.
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.if"如果",引导条件状语从句.though"尽管,虽然",引导让步状语从句.while表示"当…的时候",引导时间状语从句;意为"尽管、虽然",引导让步状语从句;意为"而、但是",引导比较状语从句.分析可知前后两句话之间是逻辑上的"条件"关系,可排除C和D;再结合句子所表达的意思可知答案选A.
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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