问题补充:
We can’t go on with the experiment because the computer.
A. hasn’t been repaired
B. hasn’t repaired
C. is not repaired
D. hadn’t been repaired
答案:
(答案→)A. hasn’t been repaired
B. hasn’t repaired
C. is not repaired
D. hadn’t been repaired
解析:A项用了现在完成时的被动语态,意思是计算机“还未被修好”。B选项中repair为及物动词,缺宾语,填上后句子不通;C选项为一般现在时的被动语态,它只表示并不是“修过的”;D选项时态不对。
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