—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．a(chǎn)m sortingD．had sorted
B
考查動詞的時態(tài)。句意：——電腦什么時候死機的？——今天上午，當我正在把從一些網(wǎng)站上下載下來的閱讀材料進行分類的時候。根據(jù)句意可知，死機發(fā)生在我正在做某事時，也就是在過去的某個時間點，我正在做某事，故應用過去進行時態(tài)。
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