2. He______the job well, but he______so careless.

A. had done;  had been

B. could do;  was

C. could have done;  was  

D. hadn’t done;  had been

C


解析:

選C。答題的關鍵在于抓住句中的but，but后面的句子是對過去事實的陳述，應用一般過去時；前面的句子則表示“本來能夠……”，是對過去事情的推斷，因此應用could have done，句意為“他本來能夠做好那工作，但他太粗心了�！�

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