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In time of serious accidents, we know some basic things about first aid,we can save lives
In time of serious accidents, we know some basic things about first aid,we can save lives
发布时间:2020-08-17 13:29:17
In time of serious accidents, we know some basic things about first aid,we can save lives.
A. whether
B. until
C. if
D. unless
网友回答
A. whether
B. until
(答案→)C. if
D. unless
解析:句意为“在遇到严重事故时,如果我们知道一些急救方面的基本知识,我们就能救人命”。If引导条件状语从句表示“如果” 时,不可用whether替换。
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