题目内容
8.A1l the candidates are required to be at the Conference Hall at 2:00pm________ otherwise informed.( )A. | unless | B. | if | C. | while | D. | though |
分析 所有的候选人都必须在下午2:00到达会议室,除非另有通知.
解答 答案A.unless"除非",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;while意思是"当…时",引导时间状语从句,意思是"尽管,虽然"时,引导让步状语从句;though"尽管,虽然",引导让步状语从句.通过分析可知前后两个句子应该是逻辑上的条件关系,可排除C和D两项.根据句子所表达的意思"除非另有通知",也就是说"如果不另有通知"的意思,故可排除B,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.本题尤其要注意区分unless和if的用法.unless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.如:Unless I am mistaken,I've seen that man before.=If I am not mistaken,I've seen that man before.如果我没搞错,我以前见过那个人.
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