The central heating system of this office building is down and several workers ______ it right now.A．had repairedB．have repairedC．repairedD． are repairing-高中英语-n多题

◎ 题干

The central heating system of this office building is down and several workers ______ it right now.

A．had repaired

B．have repaired

C．repaired

D． are repairing

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“The central heating system of this office building is down and several workers ______ it right now.A．had repairedB．have repairedC．repairedD． are repairing…”主要考查了你对【一般现在时】，【将来进行时】，【过去完成进行时】，【过去将来时的被动语态】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

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