-You don’t look well. Are you ill?---No the exam is coming and I reading unt

问题补充：

------ You don’t look well. Are you ill?

------ No, the exam is coming, and I reading until midnight.

A. kept up

B. got up

C. stayed up

D. work up

答案：

A. kept up

B. got up

(答案→)C. stayed up

D. work up

解析：考查动词短语：A. kept up维持，B. got up起来 C. stayed up熬夜D. work up逐渐造成，句意：--你看起来不好，生病了吗？--没有，快考试了，我熬夜看书到午夜。选C。