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题目
题型:不详难度:来源:
一 When did the computer crash?
一 This morning, while I   the reading materials downloaded from some websites.
A.have sortedB.was sortingC.am sortingD.had sorted

答案
B
【考点】本题考查时态的用法
解析
首先根据时间状语this morning知道是发生过的事情,去除A、C两项,然后过去完成时的使用前提是有动作的先后顺序,然而本句指的是“今天早晨我正把从网上下载的阅读材料分类时电脑坏的。”指的是过去正在进行的动作用过去进行时,B项正确。
核心考点
试题【一 When did the computer crash?一 This morning, while I   the reading materials do】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
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