Bob would have helped us yesterday, but he- A.was busyB.is busyC.had been busy.
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Bob would have helped us yesterday, but he-_______
| A.was busy | B.is busy | C.had been busy. | D.will be busy |
试题答案
A
解析试题

Bob would have helped us yesterday, but he-_______
| A.was busy | B.is busy | C.had been busy. | D.will be busy |
A
解析试题