On Thursday October 3, Adam Harper decided to stop drinking coffee. Adam is a MBA student at Harvard University. He studies long hours, gets very little sleep and as a result, he drinks a lot of coffee---anywhere from five to six cups a day. Recently, Adam felt that drinking thus much coffee was making it hard for him to sleep at all. He also began having problems with his concentration(注意力), and complained of stomachaches. Adam’s doctor made this suggestions: stop drinking coffee altogether.
When Adam got up on October 3, he began his day without his morning coffee. By 11:00 a.m., Adam was in a terrible mood (情绪). He was tired and had a headache. At 11:30, he had a meeting with his student advisor. In the meeting, he found it almost impossible to continue. What was going on?
Caffeine, a chemical found in coffee, was most likely the reason for how Adam felt. Caffeine is a stimulant that boosts(增加) energy levels and improves concentration- but only for a short time. Lowering caffeine consumption(减少摄取咖啡因) often causes a drop in blood pressure and the result is a “coffee headache”, People who stop drinking coffee often say they feel tired and moody, and find it hard to focus.
The good news is that these feeling usually pass after four and five days. During this time, doctors suggested taking some aspirin for the headache. So, if Adam can wait, in less than a week, he may be feeling much better.
We learn from the reading Adam_________.

A．does researches on caffeine.

B．had some problems because of coffee.

C．still drinks 5 to 6 cups of coffee a day

D．can never be feeling better

In fact, coffee can really help us______.

A．to go to sleep very fast

B．to work for long hours

C．not to get ill easily

D．not to depend on medicine

People may feel _____ when they stop drinking coffee.

A．healthier

B．uneasy

C．energetic

D．awaken

What happened to Adam on Thursday October 3?

A．He didn’t go to his study.

B．He complained about the student advisor.

C．He didn’t drink any coffee at all.

D．He decided to stop drinking coffee.

The good news shows that_____.

A．Adam will be better if he stops drinking coffee.

B．More and more people will give up coffee.

C．Aspirin can stop us thinking coffee

D．Coffee can never cause headaches.