It will be hard for us to get up in the morning if we to bed too late.A. go B. wentC. will

问题补充：

It will be hard for us to get up in the morning if we to bed too late.

A. go

B. went

C. will go

D. have gone

答案：

(答案→)A. go

B. went

C. will go

D. have gone

解析：句意：如果我们睡觉太晚，对于我们再来在早晨起床就太难了。英语中当主句描述将来动作时，条件状语从句中用一般现在时态表示将来动作。故选A。