18．Ever tried taking smart drugs（药） to perform better in exams？They certainly work．Before last summer's exam，a few of my classmates，only out of curiosity，took a large amount of Modafinil，a drug normally used for narcolepsy（嗜眠发作症）．Guess what？While I was feeling sleepy，bored by homework，my classmates were more focused．
Modafinil is a smart drug that gives a user a feeling of staying awake for hours．It also sharpens the mind，improves memory and helps problem-solving．
But it does more than just keeping you awake．It disturbs your mental（神经的） system，making you do what you are doing with all efforts．You just don't want to do anything else but do homework all the time non-stop．
A recent study discovers that healthy people use smart drugs，like Modafinil，to get down to and complete tasks they have been putting off，because these tasks seem more enjoyable when taking these drugs．This might sound like what a stressed（有压力的） student wants．However，the pills have some side-effects．
"At present no evidence shows that these drugs are safe in healthy people，"as a medical expert puts it，"Ordering online，though easy，is a dangerous way to get drugs．You never know what you're actually buying．"
In my experience，Modafinil changes people's behaviour too．Over those weeks my friends became different people-in turn strange，cold．Even eating became"a waste of time"and so did conversation．
A survey found that of those who had tried smart drugs before，92% would do so again．My friends say they'd happily do so without considering the practice a form of cheating．
I admit I was curious-but not enough to try it．Seeing the strange behaviour of other users，I feel a little bit upset and frightened．Modafinil may promise to change your grades，but it might also change the way you act．Don't say you haven't been warned!
66．According to the author，his classmates took Modafinil for the purpose ofB．
A．escaping from reality
B．getting better exam results
C．staying awake
D．leading an active life
67．Taking the smart drug can lead toD．
A．cheating in the exam
B．dropping out of school
C．behaving better than before
D．getting the habit of taking it
68．What does the author think of his classmates'taking the smart drugs？A
A．Worrying．
B．Inspiring．
C．Acceptable．
D．Reasonable．
69．Which statement about Modafinil is wrong？D
A．Modafinil sharpens the mind and helps problem-solving．
B．Modafinil more than just keeps you awake．
C．Modafinil has some side effects．
D．Modafinil is safe in healthy people．
70．The passage is probably written toD．
A．Teachers B．Doctors C．Scientists D．Students．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们叙述了Modafinil这种药的药效，有些要考试的人在吃了以后特别愿意复习，非常精神不愿意停止学习，并且能够提高自己的成绩，但是它也有副作用，长期服用会起依赖的作用，最后表明作者的观点不赞成吃这种药．
解答 BDADD
66．B．细节理解题．根据文章第一段Ever tried taking smart drugs to perform better in exams，可知大部分学生选择去吃这种药是为了在考试中表现得更好，得到一个更好的成绩，故选B．
67．D．推理判断题．根据文章倒数第二段"A BBC survey found that of those who had tried smart drugs before，92% would do so again"，凡是服用过这种药物的人绝大部分会继续服用，可推测这种药物会使人上瘾．故选D．
68．A．细节理解题．根据文章最后一段"Seeing the strange behavior of other users，I feel a little bit upset and scary"作者对于其他使用者的表现感到有点沮丧和恐惧．可判断作者对这种药物的作用是担忧的，故选A．
69．D．细节理解题．根据文章第五段"At present no evidence shows that these drugs are safe in healthy people，可知现在还没有证明这种药是安全的，故选D．
70．D．细节理解题．根据文章第一段Ever tried taking smart drugs to perform better in exams？可知大部分人选择去吃这种药是为了在考试中表现得更好，因此可知这篇文章是写给学生的；故选D．
点评 学生需要认真阅读原文，把握文章大意，对文章脉络有整体的了解，能仔细查找文中细节，并能根据文章内容进行合理的推测判断．
