任何人如果同感染了HIV病毒的人性交，他们就有染上这种病毒的危险。许多携带病毒的患者看上去十分的健康。只有当这种病毒发展成艾滋病时，人才会显出病态来。

Part 3 Multiple Choice

1. I don't think we've met before. You're taking me for ______.

A. some other B. someone else C. other person D. one other

2. You must keep on working in the evening, ______ you are sure you can finish the task in time

A. as B. if C. when D. unless

3. －Shall we go to the art exhibition right away?

－ .

A. It's your opinion B. I don' t mind

C. It's all up to you D. That's your decision

4. Kathy______ a lot of Spanish by playing with the native boys and girls.

A. picked up B. took up C. made up D. turned up

5. After dinner he gave Mr. Richardson ______ ride to ______ Capital Airport.

A. the; a B. a; the C. 不填; a D. 不填; the

6. Helen ______ go on the trip with us, but she isn't quite sure yet.

A. shall B. must C. may D. can

7. The manager had fallen asleep where he ______, without undressing.

A. was laying B. was lying C. had laid D. had lied

8. My ______ of this weekend's activity is going out with some good friends.

A. idea B. opinion C. mind D. thought

9. That was really a splendid evening. It's years ______ I enjoyed myself so much.

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

10. －I'm terribly sorry I broke your glass.

－ .

A. That's right B. Bad luck C. Sorry D. You can forget it

11. John is the tallest boy in the class, _______ according to himself.

A. five foot eight as tall as B. as tall as five foot eight

C. as five foot eight tall as D. as tall five foot eight as

12. Great changes have taken place in that school. It is no longer ______ it was 20 years ago, _____ it was so poorly equipped.

A. what; when B. that; which C. what; which D. which; that

13. He is such a man who is always ______ fault with other people.

A. putting B. seeking C. finding D. looking for

14. I really can't understand ______ her like that.

A. you treat B. you to treat C. why treat D. you treating