Itwas_____computergamesthat

“It was_computer games that"是一个主语从句，在此处表示强调，根据that后的cost用的是一般过去时，在此用was加动词的ing形式。

你好，正确答案是　ＢIt was ( playing ) computer games that cost the boy a lot of time that he ought to have spent on his lessons.译文：　正是电脑游戏花了这个男孩很多时间，他本该花在功课上的。友情提示：it's ... that ... 为强调句型, it's 后加被强调部分, ( 被强调部分是句子中除谓语的其他任何成分 )意为"就是；正是"。在这个句子中，强调的是“主语”：playing computer games（现在分词短语作主语）。句子的谓语是 cost；the boy　是间接宾语；a lot of time　是直接宾语；that he ought to have spent on his lessons 是定语从句，修饰先行词 time。

答案为：B分析：it's ... that ... 为强调句型, it's 后加被强调部分其他强调句型：1. 陈述句的强调句型It is/ was + 被强调部分(通常是主语、宾语或状语)+ that/ who(当强调主语且主语指人)+ 其他部分。例子 It was yesterday that he met Li Ping.2. 一般疑问句的强调句型同上，只是把is/ was提到it前面。例子 Was it yesterday that he met Li Ping?3. 特殊疑问句的强调句型被强调部分(通常是疑问代词或疑问副词)+ is/ was + it + that/ who + 其他部分?例子 When and where was it that you were born?4.not … until … 句型的强调句A. 句型为:It is/ was not until + 被强调部分 + that + 其他部分普通句:He didn't go to bed until/ till his wife came back.强调句:It was not until his wife came back that he went to bed.B. 注意:此句型只用until，不用till。但如果不是强调句型，till, until可通用;因为句型中It is/ was not ... 已经是否定句了，that后面的从句要用肯定句，切勿再用否定句了。5.谓语动词的强调A. It is/ was ... that ... 结构不能强调谓语，如果需要强调谓语时，用助动词do/ does或didDo sit down. 务必请坐。Do be careful when you cross the street. 过马路时，务必(千万)要小心啊!B. 注意:此种强调只用do/ does和did，没有别的形式;过去时用did，后面的谓语动词用原形。我们再来看原题句子的谓语是 cost；the boy　是间接宾语；a lot of time　是直接宾语；that he ought to have spent on his lessons 是定语从句，修饰先行词 timeo(*￣︶￣*)o希望我的答案能帮到你！！加油~~ヾ(◍°∇°◍)ﾉﾞ