—Don’ttoo late or you will feel tired in class—I won’t Mum．A. stand upB. stay upC. wake

问题补充：

—Don’ttoo late，or you will feel tired in class．

—I won’t, Mum．

A. stand up

B. stay up

C. wake up

D. get up

答案：

A. stand up

(答案→)B. stay up

C. wake up

D. get up

解析：B 考查短语辨析。“不要熬夜到太晚，否则上课会感到累的。”stand up“起立”；stay up“熬夜，不睡”；wake up“醒来”；get up“起床”。B项符合题意。