It is playing computer games he spends so much time that he fails all the examsA. whichB.

问题补充：

It is playing computer games he spends so much time that he fails all the exams

A. which

B. what

C. in which

D. that

答案：

A. which

B. what

C. in which

(答案→)D. that

解析：考查强调句型和状语从句。句意“他花太多的时间玩电脑游戏，结果他的所有考试都不及格。”第一个that引导的是强调句型，本句还包含so... that句型。故选D。