题干
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(点此获取答案解析）
A
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
