完形填空

　　Life in the 21st century will obviously be very different from ___1___ it is ___2___ now. It is interesting to try to ___3___ what Me will be like ___4___. Our life style will be ___5___ in many ___6___. For example, I think that everyone will live in ___7___. There will be houses under the sea. ___8___ people will get settled ___9___ on the moon and do scientific researches. Every house will have a wireless telephone. Solar energy will be ___10___ used in houses and factories. As for education in the future, I think that children will start ___11___ at the age of 3 .To some extent, computers will take the place of ___12___. People will study ___13___ they are 30. Our __14___ life will be different too. It is possible that people will only work ___15___ hours a day. At the age of ___16___, people will retire and do ___17___ they want. Finally, when we think about the future of travel, it seems to me that it is ___18___ that most people will have a chance to ___19___ in space. Our future is promising, let's work hard for ___20___ our beautiful future.

写作(Writing)

请根据中文提示和图片利用本单元学过的词汇写一篇“The Earth”为题的文章：

(1)地球是太阳系的一颗行星；

(2)地球不停地绕着太阳转；

(3)太阳为地球提供光和热；

(4)因具有适宜的生存条件：温度、大气和水等物质，地球是目前已知的宇宙唯一有生命的天体。

注意：(1)词数100左右

　　 (2)本单元词汇：planet, Solar system, atmosphere, exist, surface

　　  (3)参考词汇：适中的：moderate；因素：factor

Have you ever wondered what you will be when you grow up? Perhaps you have thought of becoming an engineer or an environmentalist. Here’s good news: you can combine all of these career goals by designing, building and operating a solar-powered house.
　　 That is what students from 20 universities did as they competed in the U.S. Department of Energy 2009 Solar Decathlon (十项全能). Like a game show where teams compete against each other, the Solar Decathlon’s student teams competed against each other in ten separate events to see who could build the best solar-powered house. The team from Germany took the top honor.
　　 The contest is held on the National Mall in Washington D.C., and is open to the public. In order to win, the Decathlon’s teams have to successfully host a dinner party, do the laundry, run the dishwasher, and maintain a comfortable temperature in their solar-powered houses. They also have to make their houses look attractive. Team Germany’s winning "Cube House" produced a surplus (剩余) of power, even during three days of rain. This is the fourth time the Solar Decathlon has been held. The houses keep getting better and better.
　　 "The Department of Energy does research on solar and building technologies. In the 1990s, we were seeking expertise to help design houses that would integrate (合并) solar systems in a reliable way. I came up with the idea of having a competition to challenge students at architecture and engineering schools to design solar-powered houses from the ground up. I thought that having a competition would motivate these students to be creative. The new generation of our country should be innovative (创新的). They may come up with solutions that would help our country," said Richard J. King, the Decathlon’s Director.

63. The first paragraph serves as a(n) ________.
A. explanation　 　　 B. conclusion　　 　 C. background　　 D. introduction

64. Which of the following should the Decathlon’s teams consider during the competition?

a. the appearance of the house

b. the power supply of the house

c. housework management

d. the design of solar-powered kitchenware
A. abd　 　　　　 B. abc　 　　　　　 C. bcd　 　　　　　 D. acd

65. Richard came up with the idea of having a competition mainly to ________.

A. raise funds to design solar-powered buildings

B. motivate students to be creative

C. integrate solar systems with buildings
D. develop new kinds of energy

66. What do we know about the Solar Decathlon from the text?

A. The participated teams are separated from the outside world during the competition.

B. The house designed by the German team will be adopted by the Department of Energy.

C. The competition had been held three times before 2009.

D. It includes students from twenty countries around the world.
　　　　　　　　　　　　　　　　　

　　 you put the sun in the centre of the solar system did the movements of the other planets in the sky make sense.

A. If　　 B. Only if　　 C. What if　　 D. When