You must have the experience of working abroad． 查看材

ir fellows. (1)_____, medical authorities ex press their (2)_____ about the effect of smoking (3)_____ the health not only (4)_____ those who smoke but also of those who do not. In fact, non smokers who must (5)_____ inhale the air polluted by tobacco smoke may (6)_____ more than the smokers themselves.

As you aye doubtless, (7)_____, a considerable number of our students have (8)_____ in effort to (9)_____ the university to ban smoking in the classroom. I believe they are (10)_____ right in their aim. (11)_____ I would hope that it is (12)_____ to achieve this by (13)_____ on the smokers to use good judgment and show concern (14)_____ others rather than regulation. Smoking is (15)_____ by law in theater and in halls used for (16)_____ films as well as in laboratories where there (17)_____ be a fire hazard. Elsewhere, it is up to your good sense.

I am (18)_____ asking you to maintain (19)_____ in the auditoriums, classrooms and seminar rooms. This will prove that you have the nonsmokers health and well-being in (20)_____, which is very important to a large number of our students.

A．Still

B．More

C．Again

D．Further

I went there in 1984, and that was the only occasion when I ________ the

journey in exactly two days.

A. must take B. must have made

C. was able to make D. could make

听力原文：W: Hi, Professor Smith. I hear you've written a book titled Visions.

M: Yes. It explains how science will revolutionize the 21st century.

W: Could I ask you some questions concerning the book？

M: Sure!

W: Are you optimistic about the future？

M: Generally, yeah! If we go back to the year of 1900, (22) most Americans didn't live beyond on the age of 50. Since then, we've had improvements in health care and technology. There's no reason why this won't continue far into the 21st century.

W: Are we ready for the changes that will come？

M: Changes are already happening. The future is here now. We have DNA, micro-chips, the internet. Some people's reaction is to say we are too old, we don't understand your technology. (23) My reaction is to say we must educate people to use new technology now.

W: Is world population going to be a big problem？

M: Yes and no. (24) I think that world population will stop increasing as we all get richer. If you are part of the middle class, you don't want or need twelve children.

W: Will there be a world government？

M: Very probably. We have to manage the world and the resources on the global level because countries alone are too small.

W: Will we have to control over everything？

M: I think we'll learn to control the weather, volcanoes and earthquakes, illness won't exist, we'll grow new livers, kidneys, hearts and lungs like spare parts for a car. People will live to about 230 or about 250. (25) For 2000 years, we have tried to understand our environment. Now we will begin to control it.

Questions;

What does Professor Smith say about most Americans around the year of 1900？

What does Professor Smith advise we do？

When will the world population stop growing according to Professor Smith？

What does Professor Smith think human beings will be able to do？

(23)

A．Their average life span was less than 50 years.

B．It was very common for them to have 12 children.

C．They retired from work much earlier than today.

D．They were quite optimistic about their future.

You ____ buy some reference books when you go to college.

A. must

B. will have to

C. must to

D. have to

The phone is out of order; you must have it (repair) ______ .

A.have

B.have to

C.must

D.has to

Look, what you have done! You ______ must have been move careful.

A．must

B．might

C．should

D．would

A.must

B.mustn’t

C.haven’t

D.didn’t

A.at

B.for

C.over

D.after

A.had better to

B.don't

C.must not

D.don't have to