—You don’t look well Are you ill?—No the mid-term exam is coming and Ireading until midn

问题补充：

—You don’t look well． Are you ill?

—No, the mid-term exam is coming and Ireading until midnight．

A. stayed up

B. am staying up

C. have stayed up

D. will stay up

答案：

(答案→)A. stayed up

B. am staying up

C. have stayed up

D. will stay up

解析：句意：--你看起来脸色不好，你生病了吗？--没有，期中考试快到了我熬夜看书学习到深夜。根据这个对话可以看出熬夜带来的结果是脸色不好，所以熬夜肯定已经发生了。故选A。