题目内容
12.Having checked everything,he sat down to do his homework,__________ he heard a lightening strike the electricity pole in the backyard.( )A. | for | B. | when | C. | or | D. | but |
分析 已经检查了一切,他坐下来做他的家庭作业,就在这时他听到闪电击中了后院的电线杆.
解答 答案:B.根据选项 for因为,when当…时,正在这时,or否则,或者,but但是,再结合句意,就在这时他听到闪电击中了后院的电线杆,可知此处缺少了一个引导时间状语从句的连接词,故B正确,when=at that time
点评 本题考查时间状语从句的连接词,连词的辨析要根据上下文的语境进行,要特别注意一些连词的一词多义现象.如本题的when=at that time
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