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Bob would have helped us yesterday ,but he .A.was busy busyB.is busyC.had been b

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Bob would have helped us yesterday ,but he .A.was busy busyB.is busyC.had been b

Bob would have helped us  yesterday ,but he_______________.

A.was busy busyB.is busyC.had been busyD.will be busy

试题答案

A

解析