---Don’t too late or you will feel tired in class tomorrow.---I won’t Mom. Good night!A.

问题补充：

---Don’t too late, or you will feel tired in class tomorrow.

---I won’t, Mom. Good night!

A. wake up

B. get up

C. stand up

D. stay up

答案：

A. wake up

B. get up

C. stand up

(答案→)D. stay up

解析：wake up醒来，起床；get up起床；stand up站起来，坚持；stay up熬夜，不睡觉。句意：不要熬夜到很晚，否则你明天再课堂上会感到很累。结合语境可知选D。