单选题 The whole paragraph 13 from "I thought I'd used up all my adrenaline to answering the questions" is used to ______.

A、 describe the writer's reflection of what he should have done before the exam
B、 describe the depressed feeling of the writer when knowing he failed in the exam
C、 describe worrying mood in the exam and contradictory thoughts over his work at his philosophical class
D、 describe how sorry the writer was feeling for his not having been working enough for his philosophical class

【正确答案】 C

【答案解析】第13段，作者在被惊醒后发现距考试结束仅剩20分钟，感慨I thought I'd used up all my adrenaline，随后他又began writing as fast as I could to finish the questions，可推断作者认为还有好多题目可以答出来，因为他在课堂上表现良好，同时也显示出作者考试中十分忧虑。