C

　　The home computer industry has been growing rapidly in the United States for the last ten years.Computers used to be large and expensive which were very difficult to use.But scientists and technicians have been making them smaller and cheaper while at the same time they have been made easier to use.As a result.their popularity has been increasing as more people have been buying computers for their homes and business.Computers have been designed to store information and computer problems that are difficult for human beings to work out.Some have voice that speak with the operators.Stores use computers to keep records of their inventories(存貨清單)and to send bills to their customers.Offices use computers to copy letters，record business and keep in touch with other offices.People have been using computers in their homes to keep track of their money they spend.

　　One important new use for computers is for entertainment.Many new games have been designed to be played on the computers.People of all ages have been playing these games.People also have been buying home computers to play computer games.Watch movies and listen to concert at home.They have become very popular indeed.

　　43.Computer used to________.

　　A.work rapidly

　　B.be large and expensive

　　C.be easy to use

　　D.be used for fun

　　答案：B

　　44.In resent years，computers are being made________.

　　A.1arger and more,expensive

　　B.smaller and cheaper

　　C.more hard to use

　　D.to work more slowly

　　答案：B

　　45.Home computers can be use for________.

　　A.writing letters

　　B.playing games

　　C.doing business

　　D.all of the above

　　答案：D

　　46.The best title for the passage would be________.

　　A.New use for computer

　　B.The popularity of home computer

　　C.The home computer Industry

　　D.Computers at home

　　答案：A

　　D

　　If you are writing or studyin9，it makes very much difference where the light comes from.People who use books and pens every day have to be especially careful about the way the light shines on their work.

　　Every house gets i ts light either from daylight through the windows--which is the very best to use--or from lamps or electricity：but whichever kind of light it is，the way it shines toward our book or work is a matter of great importance to the eyes.

　　Take a book.sit with your back toward the window，and try to read.Your shadow(影子) falls all over the page and makes it almost as bad for your eyes as if you were in a dark room.

　　Now turn around and face the window.The page is in the shadow again，while the bright light is in your eyes.

　　Try sitting with you fight side toward the window.This is very well for reading，but if you were writing.the shadow of your hand would fall across the page and bother(打攪)you a little.

　　There is just one other way：sit with your left side to the window.Now everything is perfect for reading and for writing，too.

　　Whatever kind oi light is in the room，the rule about the right to sit is always the same.

　　47.Which of the following is true?

　　A.How the light shines on our work is of much importance.

　　B.The way the light shines on your work makes no difference.

　　C.We needn't care about where the light comes from.

　　D.People can write or study under a light that comes from any direction.

　　答案：A

　　48.You shouldn't sit with your back towards the window because________.

　　A.the light is too dark

　　B·the light is bad for your eyes

　　C.you are in a dark room

　　D.your book is in your shadow

　　答案：D

　　49.When you sit with your face towards the window, ________.

　　A.your shadow falls on your book

　　B.your book is in a shadow

　　C.the light is still dark

　　D.the light is on your page

　　答案：B

　　50.The best way both for reading and for writing is to________.

　　A.sit facing the light

　　B.1et the light shine from your back

　　C.sit with your right side towards the light

　　D.have the light come from your left

　　答案：D