It was computer games that cost the young man a lot of precious time that he ought on hi

问题补充：

It was computer games that cost the young man a lot of precious time that he ought on his lessons．

A. to play, to be spending

B. playing, to spend

C. played, to have spent

D. playing, to have spent

答案：

A. to play, to be spending

B. playing, to spend

C. played, to have spent

(答案→)D. playing, to have spent

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