题目内容：

    Many college students turn to ADHD(注意缺陷障碍) medicine during exam week, which is regarded as “smart drugs” that will help their academic(学术的) performance. The thinking is that if the drugs help students with ADHD improve their focus, they should provide the same benefit for people who don’t have the disorder.

But a new study shows that drugs can actually damage brain function of healthy students who take the drug hoping to boost their intelligence. “It’s not a smart drug which suddenly improve their ability to understand information they read,” said Lisa Weyandt, a professor at the University of Rhode Island.

To test whether this effect is real or not, researchers organized 13 students to take part in two five-hour study sessions(一段时间) in the lab. The students took the standard 30mg ADHD drugs before one session, and a sugar pill before the other. Students on ADHD drugs did experience an increase in their blood pressure and heart rates. “The medicine was having an effect on their brain,” Weyandt said. The students also showed an improvement in their ability to focus, the researchers found.

However, students on ADHD drugs experienced no improvement in reading comprehension, reading fluency or knowledge reviews, compared to when they’d taken a sugar pill. “We read aloud stories to them and asked them to recall information from the stories,” she said. “That didn’t improve.”

Worse, the ADHD drug actually harms students’ memory. It’s often misused because people pull all-nighters and they’re tired, and they think it’s going to keep them awake. Maybe it does, but it’s certainly not going to help their academic work. The brain is still developing until the mid to late 20s. It’s important to keep it healthy. There’s also a chance that ADHD drugs could endanger a student’s heart health.

1.Why do some college students take ADHD drugs?

A.To improve their sleeping. B.To get higher marks.

C.To make them feel relaxed. D.To treat brain disorder.

2.Which of the following is closest in meaning to the word “boost” in Paragragh 2?

A.Analyze. B.Affect.

C.Improve. D.Understand.

3.What effect did ADHD drugs have on the students in the experiment?

A.They became more focused.

B.Their blood pressure was reduced.

C.Their reading fluency was greatly raised.

D.They could remember better and more quickly.

4.Where can we read this text?

A.In a drug instruction. B.In a textbook.

C.In a travel magazine. D.In a news report.