The home computer industry has been growing rapidly in the United States in the last ten y

The home computer industry has been growing rapidly in the United States in the last ten years. Computers used to be large, expensive machines that 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 businesses.
Computers have been designed to store information and compute problems that are difficult for human beings to work out. Some have voices that speak to their operators. Stores use computers to keep records of their inventories and to send bills to their customers. Offices use computers to copy letters, record business and keep in touch with other offices. People also use computers in their homes to keep track of the money they spend.
One important new use of computers is for entertainment. Many new games have been designed to be played on computers. People of all ages play these games. People also buy home computers to watch movies and listen to concerts at home. They have become very popular indeed.
【小题1】Compared with those of today, computers used to .A．work rapidlyB．be used for funC．be large and expensiveD．be easy to use【小题2】In recent years, computers have become .A．more and more difficult to useB．slower and slowerC．more and more expensiveD．smaller and smaller【小题3】Home computers can be used for .A．doing business B．writing lettersC．playing gamesD．all of the above【小题4】Salesmen use computers mainly to .A．talk with their friendsB．write lettersC．check the list of goods and send billsD．play games for pleasureC

(答案→)C 解析：本文介绍家用电脑的普及和家庭电脑的功能的改进，从储存信息到用于生意中还有现在的娱乐功能。【小题1】细节题：从第一段的句子：Computers used to be large, expensive machines that were very difficult to use.可知过去的电脑又大又贵，选C【小题2】细节题：从第一段的句子：But scientists and technicians have been making them smaller and cheaper while at the same time they have been made easier to use. 可知现在的电脑越来越小，选D【小题3】细节题:从第二段的句子：Stores use computers to keep records of their inventories and to send bills to their customers. Offices use computers to copy letters, 可知电脑可以用来写信用来做生意，从第三段的句子：One important new use of computers is for entertainment.可知电脑可以用来娱乐，所以ABC都是对的，选D【小题4】细节题:从第二段的句子：Stores use computers to keep records of their inventories and to send bills to their customers. 可知商人可以用电脑记录商品和发送账单，选C

我明天再问问老师，叫他解释下这个问题