It was____computer games that cost the boy a lot of time that he ought to haIt 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这里为

It was____computer games that cost the boy a lot of time that he ought to haIt 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这里为
It was____computer games that cost the boy a lot of time that he ought to ha
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
这里为什么

It was____computer games that cost the boy a lot of time that he ought to haIt 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这里为
选B
这句话的意思是：这个男孩把好多应该花在学习上的时间花在了玩电脑上.
这是一个强调句型,缺少的是一个名词性短语,所以要填分词playing
C肯定不对,而A和D都是用的完成时,一般用完成时我们都更多强调动作发生时间的顺序,这个句子里强调的是玩电脑这件事,而并不是时间顺序.并且,不定式的完成时或现在分词完成时,更多用在状语,很少用于主语.

B. 考察强调句 It was that ，强调的是主语，用playing ,动名词作主语是习惯性经常性的动作，而不定式表示具体动作表示将来。

B.playing
这里只能选动词ing形式 不选D是因为 这并不是完成时态 只不过是陈述一个事实

A that that B what what C that what D what that A. that that It was that 强调句型 that 定语从句修饰money D what that