It was playing computer games that cost

问题选择题

It was playing computer games that cost the boy plenty of time that he ______ spent doing his lessons.

A．might have

B．should

C．ought to have

D．could

答案

答案：C

考查情态动词。根据句子，指的是过去的情况，所以要用情态动词加完成时态表过去本应该做而实际没做的事。might have done,本可以做某事；ought to have done本应该做而实际没做。句意：玩电脑游戏花费了这个男孩大量的时间，他本应该把时间用在功课上。所以选C。