问题详情

The computer plays an important part in our everyday life. It is one of the great inventions in the world in the {A. twenty; B. twenties; C. twentieth} century. It works for us not only at home, in the offices, in big shops,
{A. Also; B. But also; C. Too} at schools. Today it is used in many ways. It really brings the world large wealth (财富) and happiness.
The first computer in the world was called Enid. It was built in America in 1946. It was large and heavy. {A. For; B. Until; C. Since} it was born, it has been developing very fast. Until now it has gone through four periods and changed a lot. There’re many kinds of computers. Computers are getting smaller and smaller and computing faster and faster. It becomes more and more helpful.
The computer can do most of the things {A. for; B. to; C. at} the people. It can help us to know about the real world more quickly, to learn {A. what; B. that; C. which} we want to learn and to think for ourselves. As a student in the twenty-first century, you must work hard at it.