問題詳情
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
(A) had repaired
(B) have repaired
(C) repaired
(D) are repairing
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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