C

Perhaps the biggest difference is the growth of computers. Computers can think, can remember, can calculate faster than any human brain. A computer can hold more than a million facts in its memory. There are computers that are so big that they could fill this entire auditorium (礼堂) with machinery. Businesses and banks are now managed by computers. If you work in America, you would receive your marks on little printout from the computer, not from your teachers, In America we pay bills. We have to pay for our children's university study from a computer and I pay the computer who then writes me another letter to say,“Thank you for your payment. You now own such and such amount. ”This is not even seen by a human being. It is all between me and the computer. However, if a computer make a mistake, that won't help you. If a computer makes a mistake about one of you, it is terribly difficult to correct that mistake. And sometimes a computer does make a mistake that is never learned by another computer and the same mistake will go into other computers. And it becomes terribly difficult for one single person to correct a mistake that has been made. So in many ways people have become the servant of computers who are bigger and cleverer than they are. Of course, computers speed up every operation because computers and immediately record, remember facts and produce new information that it combines with these facts. It makes science possible. Modern science would not be possible without the computers to do the calculations.

1. “You now own such and such amount” means _______.

A. you have made a big sum of money

B. you have got a lot of computers

C. you are told how much money belongs to you

D. the computer cost your money

2. If a computer makes a mistake ______.

A. another computer can correct this mistake

B. one person can easily correct this mistake

C. other computers will make the same mistake

D. other persons will make the same mistake

3. As said in the text, why have computers become the master of people?

A. Computers are as big and clever as people.

B. Computers are bigger and cleverer than people.

C. People are bigger and cleverer than computers.

D. Computers have learned how to control human beings.

4. What's the main idea of this passage?

A. Computers play the most important roles in modern science and technology.

B. People play the most important role in the new age of science and technology.

C. Computers are widely used in American daily life.

D. People have changed computers greatly.