5. A. takes 　　　　　 B. helps 　　　　 C. gets 　　　　　 D. brings

4. A. in　　 　　　　　 B. to 　　　　　　 C. by 　　　　　　 D. over

3. A. also　 　　　　　 B. but also 　　 C. too 　　　　　 D. either

2. A. twenty-first 　 B. twenties　 C. twelfth 　　 D. twentieth

1. A. inventions 　　 B. discoveries C. robots 　　　　　　　 D. inventors

15．A。穿毛衣时衣领子挤压眼、鼻引起疼痛，故应选collar。

17

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.

14．B。take　 a　 sweater　 off意为“脱去毛线衣”。

13．B。医生对自己经常检查的病人，出现新的病情应作为严肃的事情来处理，故应选seriously。

12．C。妈妈感到惊讶是因为她从未听儿子提到过这回事，故应选never。

11．D。深爱儿子的妈妈第一次听说儿子鼻子、眼睛有问题应感到惊讶，故选择surprised。