题目内容
【题目】 It was ______ computer games that cost the boy a lot of time that he ought to have spent on his lessons.
A. to have played B. playing
C. played D. having played
【答案】B
【解析】
试题分析： 考查强调句和动名词做主语。句意：玩电脑会浪费一个男孩本应该学习的时间。强调句子的主语playing computer games，谓语动词 是cost ,而that he ought to have spent on his lessons.是time的定语从句，故选B项。
考点 : 考查强调句和动名词做主语
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