【正文】 . thing C. word D. trouble9. A. waited B. thought C. stood D. looked10. A. did B. will C. have D. do11. A. excited B. interested C. pleased D. surprised12. A. already B. just C. never D. always13. A. angrily B. seriously C. happily D. carefully14. A. turning B. taking C. keeping D. putting15. A. collar B. nose C. mouth D. ear17The puter 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 (財(cái)富) and happiness.The first puter 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（時(shí)期，階段）and changed a lot. There’re many kinds of puters. Computers are getting smaller and smaller and puting faster and faster. It bees more and more __10__.The puter 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 twentyfirst century, you must work hard at it.1. A. inventions B. discoveries C. robots D. inventors2. A. twentyfirst B. twenties C. twelfth D. twentieth3. A. also B. but also C. too D. either4. A. in B. to C. by D. over 5. A. takes B. helps C. gets D. brings 6. A. found B. invented C. called D. bought 7. A. easy B. small C. large D. light8. A. For B. Until C. When D. Since9. A. by B. across C. through D. against . serious B. harmful. C. dangerous D. helpful . for B. to C. at D. with . set B. tell C. know D. talk . what B. that C. which D. who . of B. about C. out D. for . For B. Be C. As D. To18You may think there is only sand in the desert of the world, __1__ it is not true. In the desert, as we know, there is a little __2__, but it is not __3__ for most plants. Still we can see some plants __4__ in the desert.There is __5__ in some places in the desert. We __6__ these places oases. In the oases, there are villages and towns. People grow __7__ kinds of crops in the fields there.People __8__ live outside the oases. They have camels, sheep and other animals. These animals depend __9__ the desert plants for their food and do not need __10__ water.The __11__ are useful to the desert people in many ways. They eat the meat and drink the milk of the animals. They use the camels for carrying water, food, tents and something else.The people of the desert have to keep moving from place to place. They must always look 12 grass or desert plants for their animals. When there is no more food for their animals, they move to __13__ place. The desert people are __14__. No man in the desert would ever refuse __15__ the people in trouble and give them food and water.1. A. and B. but C. or D. so2. A. rain B. rains C. wind D. winds3. A. good B. good enough C. enough good D. enough4. A. live B. to live C. lives D. lived5. A. stones B. plants C. wood D. water6. A. say B. tell C. call D. find7. A. every B. all C. a D. one8. A. also B. too C. either D. still9. A. with B. in C. on D. by10. A. a little B. few C. much D. any11. A. water B. plants C. crops D. animals12. A. at B. for C. up D. after13. A. other B. the other C. the others D. another14. A. well B. friend C. friendly D. carefully15. A. help B. helps C. helping D. to help19 Once upon a time, a rich man wanted to make a trip (旅行) to another town. He tried not only to take things to sell but also to take mo