The program is like a window on the world ____ you sit by it and fix your attention on what it shows.

A、if B、as C、while　 D、unless

Emergency line operators must always ________ calm and make sure that they get all the information they need to send help.

A. grow　 　　　　 B. appear 　　　　 C. become　　　　 D. stay

I am sorry to trouble you, ______ can I have your name?

A. so　　　　 B. and　　　 C. but　　　 D. or

You have no business _____ to me the way you did yesterday.

 　 A. about talking　　　 B. talking　　　　 C. talked　　　　 D. on talking

Certainly , you can get ______you are after by hard work.

A. that　　　　 B. where　　　 C. what　　　 D. some

When it______ air pollution, Beijing faces the three “C” s-----cars，coal and construction，which lead to Beijing's thick air pollution.

A. refers to　　　 B. comes to　　　 C. happens to　　 D. speaks to

Is it in that factory __________ “Red Flag” cars are produced?

A. in which 　　　B. where 　　　　 C. which 　　　 D. that

They showed me a medicine that was scientifically from human hair and used in helping their growth.

A. learned　　 B. chosen　　　　 C. prepared　 D. separated

If you do not use your arms or your legs some time, they become weak; when you start using them again, they slowly become strong again．Everybody knows this and nobody would think of questioning this fact．Yet there are many people who do not seem to know that memory works in the same way．When someone says that he has a good memory, he really means that he keeps his memory in practice by exercising it frequently either consciously(自觉地) or unconsciously．When someone else says that his memory is poor, he really means that he doesn’t give it enough chances to become strong．

If a friend complains that his arms and legs are weak, we know that it is his own fault．But if he tells us that he has a poor memory, many of us think his parents are to blame and that he is just unlucky, and few of us realize that it is just as much as his own fault as if it is his arms or legs that were weak．

1．It is true that the more you use your arms or legs, ___ ．

A．the weaker they become

B．the stronger they become

C．they will be useless

D．the more helpless they are

2．When someone has a good memory, this is because ___ ．

A．his parents are very clever

B．he was born clever

C．he keeps using his memory very often

D．he always does things in a correct way

3．If someone’s memory is poor, ___ ．

A．his parents are to blame

B．he is unlucky

C．he has grown older

D．he should give it more chances to become strong

4．This passage mainly tells us that ___ ．

A．one’s memory can be trained

B．one should practise using his arms or legs more frequently

C．if someone has a good memory, he is usually lucky

D．it’s his parents fault if he has a poor memory

The article opens and closes with descriptions of two news reports, each _____ one major point in contrast with the other. 
A. makes     B. made     C. is to make     D. making