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I came into classroom, the students were having a discussion. A. While B. When C

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I came into classroom, the students were having a discussion. A. While B. When C

______Icame into classroom, the students were having a discussion.

A.While    B.When

C.Once    D.Since

 

试题答案

答案：B

提示：

选B。when在此处引导时间状语从句，其谓语动词所表示动作与主句谓语动词表示的动作在过去某一时间同时发生。

 

标签：thestudentswerecameinto

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