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题目
题型:不详难度:来源:
The central heating system of this office building is down and several workers ______ it right now.
A.had repairedB.have repairedC.repairedD. are repairing

答案
D
解析

试题分析:句意:这座办公楼的集中供暖系统坏了,几名工人目前正在修理。表示现在正在做某事,用现在进行时,选D。
核心考点
试题【The central heating system of this office building is down and several workers _】;主要考察你对一般现在时等知识点的理解。[详细]
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