题目内容
-When did your computer go wrong?
-Last night, while I_______ some music from a website.
A. downloaded B. am downloading
C. was downloading D. have downloaded
【答案】
C
【解析】
试题分析:句意:你的电脑何时出了问题?昨晚,当我从网站上下载音乐时。表示过去某一时刻正在发生的动作用过去进行时态,所以选C。
考点:考查动词时态。
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