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(2013·高考天津卷)The water supply has been cut off temporarily because the workers ________ one of the main pipes.
A.had repairedB.have repaired
C.repairedD.are repairing
D
选D。句意为“供水暂时已被切断,因为工人们正在修其中一个主管道”。根据has been cut off判断应该是现在的某种时态。再根据时间状语temporarily可以判断出repair是现在正在发生的动作,故用现在进行时。
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