阅读理解
This past fall semester, at Duke University, there were two students who were taking Organic Chemistry. They did pretty well on all of the tests and the midterms and labs, etc. , such that going into the final they had a solid "A". These two friends were so confident going into the final that the weekend before finals' week, even though the Chemistry final was on Monday, they decided to go up to the University of Virginia and have a party with some friends up there. So they did this and had a great time. However, with the aftereffects of alcohol and everything, they overslept all day Sunday and didn' t make it back to Duke until early Monday morning. Rather than taking the final then, what they did was to find Professor Aidric after the final and explain to him why they missed the final. They told him that they went up to UVA for the weekend, and had planned to come back in time to study, but they had a flat tire(爆胎)on the way back and didn' t have a spare and couldn' t get help for a long time and so were 1ate getting back to campus. Aldric thought this over and then agreed that they could make up the final on the following day. The two guys were overjoyed and relieved. So, they studied that night and went in the next day at the time that Aldric had told them. He placed them in separate rooms and handed each of them a test booklet and told them to begin. They looked at the first problem, which was something simple about free radical formation and was worth 5 points. "Cool, " they thought, "this is going to be easy. "They did that problem and then turned the page. They were unprepared, however, for what they saw on the next page. It said:(95 points)Which tire was flat?
单选题
The two students decided to visit their friends at the weekend because______.
【正确答案】
C
【答案解析】
单选题
They didn't return as planned because______.
【正确答案】
B
【答案解析】根据文章第一段最后一句“However，with the aftereffects of alcohol and everything，they overslept…”可知，喝酒的后遗症使得他们整个周日都在睡觉，直到下 周一早上才回到学校。因此，他们未按计划返回的原因是喝醉酒导致他们睡过了头， 所以选项B正确。其他三个选项并非他们未按计划返校的真实原因。
单选题
How did the Professor arrange the make-up exam?
【正确答案】
C
【答案解析】根据文章最后两段“They looked at the first problem，which was…”可知， 教授为他们安排了补考，考卷由两道题组成，第一题占五分且非常容易，第二题占95 分，但是与专业知识无关，而是问他们哪个轮胎爆胎了。这道题超出了这两位学生的 预料。因此选项C“教授出了一道令人惊讶的问题”符合题意。其他三个选项与文义 不符。
单选题
When they took the first glance at the exam booklet, they thought______.
【正确答案】
A
【答案解析】根据文章倒数第二段第一句“…this is going to be easy．”可知，这两位学 生看到试卷的第一题时，认为考题将会很简单。故选A。
单选题
It can be inferred from the passage that______.