The boy spent as much time playing video games as he studying.A. doesB. had beenC. wasD.

问题补充：

The boy spent as much time playing video games as he studying.

A. does

B. had been

C. was

D. did

答案：

A. does

B. had been

C. was

(答案→)D. did

解析：考查同级比较句型的用法。在这样的句型中，因为主句已经出现了动词spent，那么比较从句则省略词动词，转而用一个助动词did代替它。句意：这个男孩玩电脑游戏的时间和学习的时间一样多。故D正确。