(2013·高考天津卷)The water supply has been cu
问题:
(2013·高考天津卷)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
(2013·高考天津卷)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