—Don’t so often. It’s bad for your health.—I have to. But I know I should have enough sle

问题补充：

—Don’t so often. It’s bad for your health.

—I have to. But I know I should have enough sleep.

A. get up

B. stay up

C. look up

D. come up

答案：

A. get up

(答案→)B. stay up

C. look up

D. come up

解析：句意：不要经常熬夜，这样对你的健康不利。所给选项中get up是起床的意思，stay up是熬夜的意思，look up是向上看或查找的意思，come up是出现的意思，根据题意只能选B。