题目内容
14.-We'll visit the Summer Palace_______ there is a heavy rain tomorrow.-OK!Boating on the lake must be great fun.( )
| A. | unless | B. | since | C. | as soon as | D. | if |
分析 --我们将要去参观颐和园,除非明天下大雨.--好的!在湖上泛舟一定很有趣.
解答 答案:A.unless意思是"除非,如果不"引导条件状语从句,相当于if…not;since意思是"自从…以来"引导时间状语从句;as soon as意思是"一…就…"引导时间状语从句;if意思是"如果"引导条件状语从句.根据"____there is a heavy rain tomorrow"以及"We'll visit the Summer Palace"可知"明天不下雨才能去颐和园,下雨的话就不去了".结合给出的四个选择项,unless符合句意,所以要用unless,故选A.
点评 首先要掌握unless,since,as soon as,if这几个词或短语的用法,然后结合具体的句意,就可以做出正确选择.
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