完形填空
The computer plays an important part in our everyday life. It is one of the great __1__ in the world in the __2__ century. It works for us not only at home, in the offices, in big shops, __3__ at schools. Today it is used __4__ many ways. It really __5__ the world large wealth (财富) and happiness.
The first computer in the world was __6__ Enid. It was built in America in 1946. It was __7__ and heavy. __8__ it was born, it has been developing very fast. Until now it has gone __9__ four periods（时期，阶段）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 __10__.
The computer can do most of the things __11__ the people. It can help us to __12__ about the real world more quickly, to learn __13__ we want to learn and to think __14__ ourselves. __15__ a student in the twenty-first century, you must work hard at it.
