Unit 13 Were trying to save the earth一 、 单项选择 （15分） ( ) 1. We must try _ all the endangered animals. Because they are our friends.A. save B. to save C. saving D. to be saving ( ) 2. Remember to _ the lights when you leave the room. A. turn on B. turn off C. turn up D. turn down( ) 3. This kind of car is very cheap. It only _ him 120,000 yuan to buy it. A. took B. paid C. spent D. Cost ( ) 4. Our teacher said this book was very useful. We must put it to _ use. A. bad B. good C. badly D. well ( ) 5. Everyone in this city must _ part in cleaning it up. A. play B. give C. take D. have ( ) 6. So far, we _ more than 2,000 English words. A. learn B. learned C. have learned D. had learned ( ) 7. There is _ rubbish and waste in this district. It is a very dirty place. A. too much B. too many C. much too D. many too ( ) 8. In my childhood, I used to _ stars in the sky. A. can see B. could see C. be able to see D. am be able to see ( ) 9. To cut down the air pollution, we should take the bus _ driving. A. instead B. instead of C. because D. because of ( ) 10. Remember to throw the rubbish in the bin and keep public place _. A. clean B. to clean C. cleaned D. cleaning ( ) 11. People throw rubbish _ place like parks. This turns beautiful parks into ugly places. A. in common B. in total C. in public D. in need ( ) 12. _ the air pollution, we should walk or ride bikes rather than taking cars. A. Cut down B. Cutting down C. To cut down D. Been cutting down ( ) 13. _ water, nothing can live, so we must try to protect water. A. With B. Without C. Under D. In ( ) 14. The number of this king of sharks _ by over 20 to 30 percent in these years. A. have fallen B. has fallen C. had fallen D. have been falling ( ) 15. _ is a waste, if you put you have a creative mind. A. Something B. Everything C. Anything D. Nothing二、 完形填空 （10分）Are only clever and good-looking students happy in the school? Best-selling _1_ Xiao Nizi (Nini) doesnt think so. “_2_ has his own place in the sky. she said. Were all special in our own ways.”Nini, from Hunan, writes stories about young people in the school. Her books, _3_ Devils Kiss and Un-e on Midsummers Night, are very _4_ with students.In her stories, the main characters arc usually common girls who are neither pretty _5_ smart. But they always win the love of a Prince Charming(白马王子)，or _6_ successful stars.Its not because of luck. said Nini. They are _7_ honest and they dont lie. They know what they arc good _8_ and work hard to realize their dreams. Nini herself is like one of the characters in her stories. She was a shy girl at school. But she thought a lot and liked languages, and that made her _9_ to be a writer. She hopes her stories _10_ make more kids happy.1. A. writer B. reader C. speaker2. A. Nobody B. Everyone C. Someone3. A. as B. for example C. such as4. A. successful B. popular C. funny5. A. nor B. or C. but6. A. become B. make C. take7. A. still B. only C. ever8. A. at B. for C. with9. A. deciding B. to decide C. decide10. A. can B. must C. need三、 阅读理解 （30分） A Mrs. Blake teaches English in a large school in the inner area of a big city on the west of coast. Even since she was a young girl, she has wanted to become a teacher. She has taught eight years now and hasnt changed her mind. After she graduated from high school， she went on to college. Four years later， she received her bachelors degree （B A） in English and her teaching certificate（证书）。 Then she went to teach in the secondary schools of her state. In the summers， Mrs. Blake takes more classes； she hopes to get a masters degree （M A）。 With an MA， she will receive a higher salary and if possible， she hopes to get a doctors degree as well. The school day at Mrs. Blakes high school， like that in many high schools in the United States， is divided into one hour each. Mrs. Blake must teach five of these periods. During her free period， which for her is from 2 to 3 P.M. ， Mrs. Blake must meet with parents， make out examinations， check assignments at all， Mrs. Blake works continuously from the time she arrives at school in the morning till the time she leaves for home late in the afternoon. 1. How long is it since Mrs. Blake graduated from middle school？ A. four years B. eight years C. twelve years d. twenty years 2. According to the ar