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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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 |