It was computer games that cost the boy lot of time that he ought to have spent on his les

发布时间：2020-08-17 13:23:36

It was     puter games that cost the boy lot of time that he ought to have spent on his lessons.
A. to have played
B. playing
C. played
D. having played

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A. to have played
(答案→)B. playing
C. played
D. having played
解析：本句是一强调句式，被强调部分在句中作主语，由动名词充当。
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