题目内容
4.You won't calculate faster than computers ______ you have a really amazing brain.( )| A. | if | B. | unless | C. | when | D. | because |
分析 除非你有一个非常惊人的大脑,否则你不会比计算机计算地更快.
解答 答案:B;if如果;unless除非;when当…的时候;because因为;根据句意,"You won't calculate faster than computers你不会比计算机计算地更快"和"you have a really amazing brain你有一个非常惊人的大脑",可知二者在逻辑上是相矛盾的,故此处用表示否定的连词,因此用unless意为除非,相当于if…not;故选B.
点评 认真比较选项中四个连词的不同含义及其用法,然后结合语境选择正确答案.
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