(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．a(chǎn)re repairing
D
選D。句意為“供水暫時(shí)已被切斷，因?yàn)楣と藗冋谛奁渲幸粋�(gè)主管道”。根據(jù)has been cut off判斷應(yīng)該是現(xiàn)在的某種時(shí)態(tài)。再根據(jù)時(shí)間狀語(yǔ)temporarily可以判斷出repair是現(xiàn)在正在發(fā)生的動(dòng)作，故用現(xiàn)在進(jìn)行時(shí)。
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