摘要：[2013天津]13. The water supply has been cut off temporarily because the workers one of the main pipes. A. had repaired B. have repaired C. repaired D. are repairing
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The water supply has been cut off temporarily because the workers________one of the main pipes.????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? (2013·天津，13)
A．had repaired? B．have repaired
C．repaired? D．are repairing
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