Question

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

Answer 1

C

解析:

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。”