题目内容
Bob would have helped us yesterday,but he .
A. was busy B. is busy C. had been busy D. will be busy
A
上文用的是虚拟语气，与过去事实相反。下文是讲的昨天忙这样的事实，用一般过去时。
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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 |
Bob would have helped us yesterday ,but he_______________.
|
A．was busy busy |
B．is busy |
C．had been busy |
D．will be busy |