题目内容
5.The bell rang the teacher was explaining the experiment to the students.( )A. | until | B. | before | C. | while | D. | after |
分析 当老师正在向学生解释这个实验的时候,铃响了.
解答 答案:C until直到;before在…之前;while当…的时候;after在…之后.根据主句和从句的意义可知铃响了和老师正向学生解释实验这两个动作是同时发生的.应用当…时候强调正在做某事,结合选项这里应用while引导这个时间状语从句.故选C.
点评 此题考查从属连词的用法.做题时一定要联系语境根据句意判断出前后主句和从句的关系,再结合选项选出符合句意的连词.
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