21、The Internet is becoming important in our life．How much do you know about it?

What is the Internet?

The Internet is a large, worldwide collection （聚集） of computer networks （网）．A network is a small group of computers put together．The Internet is many different networks from all over the world．These networks are called the Internet．Once you have learned to use the  Internet, you can do a lot of interesting things on the World Wide Web．

What is the World Wide Web?

The World Wide Web has been the most popular development of the Internet．The Web is like a big electronic （电子的） book with millions of pages．These pages are called homepages（主页）．You can find information （信息） about almost anything in the world on these pages．For example, you can use the Internet instead of a library to find information for your homework．You can also find information about your favorite sport or film star, talk to your friends or even do some shopping on the pages．Most pages have words, pictures and even sound or music．

What is e-mail?

Electronic mail is a way of sending messages to other people．It's much quicker and cheaper than sending a letter．If you want to use e-mail, you must have an e-mail address．This address must have letters and dots （点）  and an '@' （meaning 'at'）．This is what an address心looks like: Emily@star.net．Write a message, type （打字）in the person's e-mail address, then send the message across the Internet．People don't need to use stamps, envelopes or go to the post office since the invention of the Internet．Quick, easy and interesting—— that's the Internet!

1．The Internet is

A．a big computer                               B．a small group of computers

C．lots of computer networks                            D．the World Wide Web

2．The World Wide Web is like

A．an electronic book                            B．homepages

C．an electronic page                                   D．an interesting picture

3．What does "talk to your friends on the pages" mean? It means            ．

A．you can talk to your friends face to face

B．you can type your words in the computer and then send them to your friends across the Internet

C．you talk to your friends through the same computer

D．you go to your friends' houses to talk to them

4．People like to use e-mail to send messages to their friends and family because          

A．they don't have to pay any money

B．it's faster and cheaper

C．they don't need to have stamps, envelops or addresses

D．sending e-mail is interesting

5．The "e" in e-mail means                

A．easy                  B．electrical             C．electronic            D．enjoyable

20、Experts（专家）say that students usually need eight to ten hours' sleep at night, but more Chinese students do not get enough sleep．Some Chinese parents are usually glad to see their children studying late．They will think their children work very hard．But not all parents are happy about this．Once a mother told us that every morning her 10-year-old boy put up one finger with his eyes still closed ,begging （央求）for one more minute to sleep．Like thousands of student "early birds" in China, he has to get up before six every morning．

A report shows that a good night's sleep, students seem to be weaker than they should be．Many students have fallen asleep during class at one time or another．Too much homework is not the only reason why students stay up late．Some watch TV or play the computer games late into the night．

Experts have ever said that students should develop good study habits．So some clever students never study late, they are able to work well in class．

1．The 10-year-old boy begged for one more minute to sleep because

A．he didn't have enough sleep                  B．it wasn't time for him to get up

C．he didn't want to go to school                D．he wanted his mother to wake him up

2．In this passage "early birds" means persons who __

A．get up early                                           B．get up late

C．sleep less                                              D．don't want to sleep

3．From the passage we know if students don't get enough sleep, they may __

A．become too weak to sleep                   B．not work well in class

C．go to bed early                            D．be weak in English

4．"Stay up late" here means __

A．study late                                B．watch TV late

C．not go to bed until late                      D．stay outside

5．According to the passage, which of the following is right?

A．If you want to study better, you must work hard．

B．Sleeping less means working hard．

C．Some clever students can work well in class because they have good study habits．

D．Students don't have enough sleep only because they have a lot of homework to do．

18、—        we swim in that river?

—No, you        ．It's dangerous to swim there．

A．Must, can't            B．Can, may not         C．Shall, don't       D．May, mustn't

17、—Sorry, for        you       

—       

A．keep; waited; Yes, don't say so              B．kept; to wait; You can't do it again．

C．keeping; waiting; Never mind                D．to keep; wait; That's right

16、When we got to the cinema, the film         for 20 minutes．

A．had begun          B．has been on       C．had been on        D．has begun

15、I don't know if it        tomorrow． If it         , I will have to stay at home．

A．will snow, will snow                      B．snows, snows

C．will snow, snows                        D．snows,  will snow

14、—How are you getting on with your English?

—I'm much better        English        my teacher's help．

A．in, at               B．at, in              C．at, with          D．with, with