to collage this year We must study harder than ever before .A. GoB. GoingC. GoneD. To go

问题补充：

to collage this year, We must study harder than ever before .

A. Go

B. Going

C. Gone

D. To go

答案：

A. Go

B. Going

C. Gone

(答案→)D. To go

解析：不定式表示将来和目的。