We can’t go on with the experiment because the computer_________.
A．hasn’t been repairedB．hasn’t repaired
C．is not repairedD．hadn’t been repaired
A
A項用了現(xiàn)在完成時的被動語態(tài)，意思是計算機“還未被修好”。B選項中repair為及物動詞，缺賓語，填上后句子不通；C選項為一般現(xiàn)在時的被動語態(tài)，它只表示并不是“修過的”；D選項時態(tài)不對。
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