阅读理解

　　At work we often have to ask others to do things for us．The languages we use to ask for help will be different in different situations(情形)．We are usually more polite when we are asking another person to do something big for us．

　　The language also, of course, shows the relationship between the person who needs help and the person who will help．If we are asking a stranger to do something, we use language which is much more polite than when speaking to a workmate in the office or a friend．For example, you need a person to help you turn on the printer(打印机)．If a stranger is near it, you may say, “Could you please turn on the printer?” But if your friend is there, you may say, “Hi, turn on the printer for me．”

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完形填空

　　Since the beginning of time, man 　　1　　 many interesting things．Some of these inventions, 　　2　　 numbers, the alphabet and the radio, have certainly changed history．

　　One of the most important 　　3　　 has been the computer since 1946．It changed all our lives．

　　The first computer 　　4　　 at Harvard University in 1944．It was as large as a room and quite difficult and slow to operate．But since the invention of silicon(硅)chip, computers have become smaller, easier 　　5　　, and faster to operate．Some computers are as 　　6　　 as television sets．Simple computers can be made smaller than a book．And computers are getting smaller all the time．

　　There are several reasons why computer is useful to us．First, it can store(储存)very, very large amounts of information in its memory chips．　　7　　, the computer can operate very quickly．　　8　　 times faster than humans and it will never feel tired．Third, modern computer can be built into other kinds of machines, like radios, cars, and planes．They can do a lot of work for us．

　　Soon, almost everyone, either at home 　　9　　 at work, will use some kind of computer．The lives of all of us 　　10　　 by this invention．

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