1、Correcting 11China is a populous country, with the worlds largest populations. While it is also rich in water resources, its freshwater per person accounts of only a quarter of the worlds per capita (人均). Better still, water resources are unevenly distributed in China, for most freshwater concentrat
2、e in its south whereas there is only 1/4 as many in the north. Besides water scarcity in China, there is another serious problem: water pollution. Over the past decades, more than 80% of surface and ground water has polluted as a result of uncontrol discharge of industrial wastes. The consequence is
3、 that over half of the six hundred cities throughout the country are short of water supply, of that one hundred and eight are already very thirsty. For this reason, we must heighten our aware of water protection and make greater efforts to protect the environment, or else the last drop of the water
4、on Earth would be our teardrop.16. tCorrecting 11:populations-population; of-for; better-Worse; concentrate-concentrates; many-much; has been polluted; uncontrol-uncontrolled; aware-awareness; that-which; 去掉else;Correcting 12Last month, I, together with my parents, were invited to my uncle in the US
5、A. My uncle, who moved America when I was five, has been living there for nearly ten years. He meets us at the airport. I was excited while I set foot on the land of America. In the following days, we visited some places of interests and took photos in the front of the Statue of Liberty. We both enj
6、oyed visiting the Museum of Natural History because it great enriched our knowledge. For me, this is one of the most rewarding trips I have never made in my life.Keys to exe 12:1.were-was; 2. uncle-uncles; 3. moved后加to; 4. meets-met; 5. while-when; 6. interests-interest; 7 in the front去掉the; 8. both
7、-all; 9. great-greatly; 10. never-everCorrecting 13Yesterday my friend Julia and me had lunch in the Pizza Hut behind our school. I knew Julia wasnt crazy about pizzas, but she came along just because of me. At the table next to our, there were two guys from our class. One of them was really fun. He
8、 tried to imitate all customers in the Pizza Hut. We couldnt stop to laughing. And there were some people whom did not like the fact that two boys were imitating them. They complained to an owner of the Pizza Hut, so he came over and tell them to stop. Seeing it, Julia and I was greatly embarrassed.
9、Keys to exes 13: Me-I; our-ours; fun-funny; 加all the customers; 去掉to; And-But; whom-who; an-the; tell-told; was-wereCorrecting 14Having a good teacher do mean a lot to us students and I am lucky enough to have the one -Miss Brown, my English teacher.Miss Brown is a charming lady always worn a big sm
10、ile on her face. In the first class she introduced her and then asked us to say something about ourselves with English. When it was my turn, I felt too shy and fearful that I didnt dare to say a word. She came up to me and said, “Dont afraid. You can make it. Just have a try.” At last, I did it quit
11、e good. She praised me for that I had done. Never shall I forgot my first English class in senior high school.Keys to Exe 14:1. do-does 2. the one去掉the 3. wornwearing 4. her-herself 5. with-in 6. too-so 7. afraid前加be 8. good-well 9. that- what 10.forgot-forgetCorrecting 15Dear Peter, Im very glad to
12、 receive your e-mail asking for information about the host family we have arranged you to stay with. Locating in a beautiful and quiet neighborhood, the house was big enough to enable you to have a room of your own. Apart from the convenient public transportation, our private car will make your visi
13、ts easily. Because all the family members can speak fluently English and have outgoing personalities, Im sure you will have no trouble to communicating with them. Above all, they hosted the American student last year, through that they gained lots of experience. In addition, the hostess cooking will guarantee you a wonderful chance of tasting delicious Chinese food. Hope you enjoy your stay here. Keys to exe 15: arranged后加for, Locating改为Located; was改为is; our改为their; easily改为easy; fluently改为fluent; trouble to 的to去掉（或to改为in）the改为an; that改为which; hostess改为hostess
