Section A Directions: In this part there is a short passage
with five questions or incomplete statements. Read the passage carefully. Then
answer the questions or complete the statements in the fewest possible words
(not exceeding 10 words).
Drugs can be divided into three main groups: those that a
person can buy without a prescription. those that a person needs a doctor’s
prescription for, and those that are illegal. Two popular
nonprescription drugs are caffeine (咖啡因) and alcohol. Caffeine is found in
coffee, tea, chocolate, and cola drinks. It is a mental stimulant; it stimulates
the central nervous system and makes people feel alert. Students, for example,
often find they can study better if they have a cup of coffee. On the other
hand, caffeine can also make people nervous and irritable. If people drink too
much caffeine, they may have trouble sleeping. Alcohol is a
depressant; it depresses the central nervous system. When people drink, they
have less control over their actions. They cannot walk in a straight line and
they cannot drive as well as when they are alcohol-free in their blood. People
who drink a great deal sometimes fall into a deep sleep. Later, they may wake up
with a strong headache. In addition to these nonprescription
drugs, there are two major categories of prescription drugs : stimulants and
depressants. The depressants include morphine(吗啡), which is used as a pain
killer. The most common stimulants are amphetamines (苯丙胺). Doctors used to
prescribe amphetamines as diet pills ; however, they found that amphetamines can
have serious side effects. They can make a patient very nervous, and when the
drug wears off, the patient may feel very depressed. Doctors still give
amphetamines to people with narcolepsy, an illness that causes sudden,
uncontrollable attacks of sleep. The largest class of illegal
drugs are hallucinogens, drugs that .change the way a person thinks and cause
hallucinations, or visions. For some people, marijuana(大麻) is a mild
hallucinogen. Marijuana generally brings a pleasant feeling. However, when
people smoke marijuana, they sometimes can not concentrate very well on their
activities, such as their work or driving. What is the reason that too much tea drinking makes people have trouble sleeping
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