People take drugs for various reasons. Some are curious; someone are to 1________ against their families or society and others want to be 2________ by their friends who are drug users.

There are three main classes of drugs, each of which has a different effect on the body. One is called 3________ because it can increase the heart rate and make users feel very 4________ and happy. It can cause sore jaw, toothaches, difficulty sleeping, heart attacks and even death.

Another class of drugs is often referred to as 5________ because it can decrease the heart rate and may make users feel relaxed and sleepy. Using downers can make people forgetful and cause headaches, depression, shallow breathing and a weak pulse.

The last group of drugs is those that change the way people think and see the world. They 6________ the brain and sometimes cause people to see or hear things that are not real.

7________ for drug carrying 8________ from a small fine and a few days in prison to a large fine and the death penalty.

Breaking drug 9________ is difficult and painful but worthy. The drug users should first admit their problems with drugs and then seek help from a hospital or drug clinic. Drug rehabilitation programmers may include a stay in hospital, taking special medicine or have sessions with psychologist.

But the easiest way to 10________ the health problems is not to use illegal drugs in the first place.

　 A student is interviewing a doctor about the Aids. (S=Student; D=Doctor)

S: Could you tell me something about Aids, please?

D: With pleasure.

S: What is Aids?

D: Aids s____1____ for Acquired immune deficiency syndrome.

S: What causes Aids?

D: It is caused by a v____2____ called HIV, which enters a person’s blood and attacks the body’s immune system.

S: What are the s____3____ of Aids-infected people?

D: The infected person will have a weak immune system to fight illness and they will become sick very easily.

S: How is Aids spread?

D: The virus is spread in three ways-through u____4____ sex, blood-to-blood contact and mother-to-child t____5____, among which the unprotected sex is the most c____6____, accounting for 75% of adult infections worldwide.

S: Is Aids only an African problem?

D: No. Although the infection r____7____ are very high there, the disease d____8____ in 1980s has become a serious problem in many places, infecting over 60 million people worldwide.

S: How terrible! I’m very concerned about the situation in China. Can you tell me something about it?

D: To 2006, there were about 65,000 HIV-positive people and about 75,000 Aids patients in China. And the government is working hard to control the Aids epidemic.

S: Has some measures been taken to p____9____ the spreading of it?

D: Yes. Both individuals and governments have been involved in fighting Aids and HIV. The United Nations and many international o____10____ all do their best to fight against this disease.

S: I hope everyone can do his bit to this fight.

15. The old man, _____ abroad for twenty years, is on the way back to his motherland.

A. to work　　 　　　　　　 B. working　　 　　 C. to have worked　 D. having worked

14. Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.

A. since　　 　 　　　　　　 B. after　　 　　　　 C. before　　 　　　 D. when

13. .It was with great joy ____ he received the news that his lost daughter had been founded. (04年江苏)

A. because　　 　　　　　　 B. which　　 　　　 C. since　　 　　　　 D. that

12. I have done much of the work. Could you please finish ___ in two days?(04年江苏)

A. the rest　　　　　　　 　　　 B. the other　　　　　 C. another　　　 　　　 D. the others

11. Maybe you have been to many countries, but nowhere else ___ such a beautiful place. (04年辽宁)

A. can you find　　　　　　　 B. you could find　 C. you can find　　 D. could you find