·高二英语9-10单元同步练习.docVIP

·高二英语9-10单元同步练习 Unit 9 Saving the earth I. Speaking Task 1 Our earth is in danger! 　　Directions: Here are the major problems facing the earth. Work with your partner and figure out the causes and possible solutions. Problems Causes Solutions 1.water pollution 2.Trash / garbage 3. Air pollution 4.Deforestation (采伐森林) 5. Desertification (沙漠化) 6. Hunger 7. Deadly diseases 8. _____________ 　　 　　Task 2 Whats the biggest problem? 　　Directions: Among the problems listed above, which do you think is the biggest one? If you partner disagrees, then youll have to persuade him/her. 　　 　　Task 3 Polar bears problem. Directions: Go through the following passage and finish off the tasks. 1. Complete the text with the phrases: A. on average; B. wait for; C. live through; D. be forced to; E. live away from; 2. Why are polar bears getting thinner? 3. Is it good for bears to get thinner? Are they going to die out? 4. Besides polar bears, what other animals does the warming up have effect on? 5. What are the possible causes of the climate getting warmer? What can be done to stop it? 　　Polar bears are getting thinner. It is not a diet and it is not because there is less food to catch. It is because the world is getting warmer. 　　Giant white bears that live in the north of Canada are at the moment impatiently (1) ice to form. They need the ice to form a bridge to their food - seals. Seals usually (2) land among the icebergs. However, as the climate becomes warmer, winter is getting shorter and sea ice is decreasing in the area. This is making polar bears lives increasingly difficult. 　　Bears need to eat as much food as possible in the winter to make themselves fat enough to (3) five months without food in the summer and autumn. During the five-month ice-free season, the bears (4) fast (绝食). For every week a bear has not been hunting food on ice, it is 10 kilograms lighter, said a scientist. 　　The average temperature of the reg