---What’s wrong with you Eric? You look tired.---I to prepare for the final exam last ni

问题补充：

---What’s wrong with you, Eric? You look tired.

---I to prepare for the final exam last night.

A. picked up

B. woke up

C. stayed up

D. put up

答案：

A. picked up

B. woke up

(答案→)C. stayed up

D. put up

解析：picked up 捡起，顺便接某人；woke up醒来；stayed up熬夜，不睡觉；put up提供，建造，举起。句意：艾瑞克，你怎么了？你看来很累。——昨晚我熬夜准备期末考试了。结合语境可知选C。

【考点】短语辨析