A green world (Integrated skills)预学热身通过预习，了解本课时的单词、短语和句型（英汉互译）。1. survey n._2.empty adj. _3. dust n._ 4.harmful adj. _5soil n._6_保持水土 7._为提供 8_-采取恰当的行动教材导读1. The number of questions _ 6.问题数是6。探究点: the number of意为“_”比较 the number of 意为“的数量”，a number of 意为“许多”。The number of students in our class _( be) 48.A number of them _(be) from Renqiao.画线提问：The number of students and teachers in our school is about 300. the number of students and teachers in your school?2. Air pollution is harmful to our health.空气污染对我们的健康有害。探究点：be harmful to意为“_”指点迷津 be harmful to意为“对有害”，相当于do harm to。Staying up too late_ your health.Staying up too late_ your health.熬夜对你的健康有害。同义句转换 Eating too much sugar is harmful to your heath.Eating too much sugar_ _ _ your heath.热身练习A根据句意或中文提示完成句子。1. -Is there anything in the box?- No . Its _.2. Our teacher asked us to do a _ （调查）on our after-school activities. 3. Theres an old desk with thick _ in the corner of the room. 4. Dont wash things under a running _. We should save water.B. 用方框中所给词的适当形式填空tooth pollute harm much little 1. Smoking is _ to peoples health.2. Its a good habit for us to brush our _ after meals.3. To save water, wed better take showers for _ than 10 minutes.4. There are still many _ things we can do to protect the environment.5. The water in the river has been seriously _ .C按要求改写句子。1Air pollution harms our heath. （该同义句） Air pollution_ _ _ our heath. Air pollution_ _ _ our heath. (两种)2The students will show the results of their survey to their teacher. （改被动句）The results of their survey _ _ _ to their teacher.3. Pollution has become a serious problem. (该一般疑问句) _ pollution _ a serious problem?4. We can reduce air pollution by riding bicycles. (画线提问) _ can we reduce air pollution?D.链接中考:完形填空The United States is full of automobiles（机动车）.There are still many families without cars. But some families have two or 1 more. However, cars are used for 2 than pleasure. They are a 3 part of life.Cars are 4 for business. They are driven to offices and factories by workers who have no 5 way to get to their jobs. When salesmen are sent to 6 parts of the city, they have to drive in order to carry their products. Farmers have to drive into the city in order to get home.Sometimes small children must be driven to 7 . In some cities school buses are used only when children live more than a mile from the school. When the children are 8 young to walk that far, their mothers take 9 to drive them to school One 10 drives on Mondays, taking her children and the neighbours children as well. Another mother drives on Tuesdays, another on Wednesdays, and so on. This is called forming a car pool. Men also form car pools, with three or four men taking turns driving to the place 11 they work.More car pools should be formed in order to put 12 motorcars on the road and to use less 13 . Parking is a great problem, and so is the traffic in and around cities. 14 many cars are being driven,. Something will have to be done 15 the use of cars.（ ）1. A. even B. much C. little D. such（ ）2. A. better B. less C. more D. farther（ ）3. A. great B. necessary C. proper D. possible( ）4. A. bought B. used C. produced D. sold（ ）5. A. other B. long C. short D. easy（ ）6. A. busy B. some C. many D. different( ) 7. A. cities B. school C. park D. gardens( ) 8. A. quite B. very C. too D. so ( ) 9. A. money B. time C. pride D. turns( ) 10. A. mother B. child C. way D. car ( ) 11.A. where B. that C. while D. when（ ）12. A. more B. fewer C. many D. less( ) 13. A. time B. space C. energy D. oil( ) 14. A. So B. Even C. Very D. Such( ) 15. A. on B. for C. from D. about3