—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(dòng)詞的時(shí)態(tài)。句意：——電腦什么時(shí)候死機(jī)的？——今天上午，當(dāng)我正在把從一些網(wǎng)站上下載下來(lái)的閱讀材料進(jìn)行分類的時(shí)候。根據(jù)句意可知，死機(jī)發(fā)生在我正在做某事時(shí)，也就是在過(guò)去的某個(gè)時(shí)間點(diǎn)，我正在做某事，故應(yīng)用過(guò)去進(jìn)行時(shí)態(tài)。
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