选择题(详细解释)
I()abletohelpyou,butIwassobusy.A.woudhavebeenB.wasC.hadbeenD.wouldbe...
I () able to help you,but I was so busy.
A.woud have been
B.was
C.had been
D.would be 展开
A.woud have been
B.was
C.had been
D.would be 展开
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