She spent as much time as she could over her lessons.A. goB. to goC. goingD. went

问题补充：

She spent as much time as she could over her lessons.

A. go

B. to go

C. going

D. went

答案：

A. go

B. to go

(答案→)C. going

D. went

解析：句子的主干是spend time（in） doing sth. .