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—When did the computer crash?
—This morning,while I ________ the reading materials downloaded from some websites.(2012·福建)
A.have sortedB.was sorting
C.am sortingD.had sorted
B
考查动词的时态。句意:——电脑什么时候死机的?——今天上午,当我正在把从一些网站上下载下来的阅读材料进行分类的时候。根据句意可知,死机发生在我正在做某事时,也就是在过去的某个时间点,我正在做某事,故应用过去进行时态。
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