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(guān)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(yīng)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(yīng)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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