八、根据首字母提示填空。
Pollution(污染) is a very serious problem(严重的问题) today. Look at the rivers. They are d and smelly(有臭味的). The fish are d. Look at the sky. It is dark and dirty. Look at the crops(庄稼). They can't g well. There are many factories a us. They m a lot of goods(商品)，but they make a lot of s and dirty water too. In Japan，some people sell clean air. W? There is less and less(越来越少的) clean a in Japan. So all of us s do something to h keep our city clean.

dirty; dead; grow; around; make; smoke; Why; air; should; help

1. 根据“rivers”“smelly”及首字母d，填dirty（脏的）；
2. 结合污染的语境及首字母d，鱼是死亡的，填dead；
3. 庄稼受污染无法正常生长，首字母g，填grow；
4. 表示“在我们周围”，首字母a，填around；
5. 工厂制造商品，首字母m，填make；
6. 工厂会产生烟和脏水，首字母s，填smoke；
7. 前文说卖干净空气，此处问原因，首字母W，填Why；
8. 对应前文的clean air，首字母a，填air；
9. 表示“应该”做些事，首字母s，填should；
10. 表示“帮助”保持城市干净，首字母h，填help。

九、完形填空。
The air is usually dirty in winter. Smog(烟雾) makes the air 1. We can find smog in many cities. We cannot see clearly in the heavy smog. Sometimes，we cannot 2.
Smog is bad for people. It makes people 3. Old people have to stay at home. Children cannot play in the 4 after class. They have to stay in their classrooms. What should we do? We should not drive so much 5 there's a lot of smoke from cars. We should also plant more trees because trees help keep the air clean.
()1. A. clean
B. dirty
C. messy
()2. A. eat
B. sleep
C. drive
()3. A. happy
B. ill
C. sad
()4. A. school
B. park
C. playground
()5. A. because
B. and
C. so

1.B；2.C；3.B；4.C；5.A

1. 根据前文“The air is usually dirty in winter”，烟雾会让空气更脏，选B。
2. 大雾中视线不佳，无法正常开车，选C。
3. 烟雾对人体有害，会使人生病，选B。
4. 由后文“They have to stay in their classrooms”可知，课后孩子们不能在操场玩耍，选C。
5. 空格后是“不该多开车”的原因，用because表因果，选A。

十、阅读短文，判断下列句子是否与短文内容相符，相符的写“T”，不相符的写“F”。
Air is around us as we walk and play. When we sit down，it is around us. When we go to bed，air is also around us. We live in air. We can live with no food or water for a few days，but we cannot live for more than a few minutes with no air. We take in air. When we are doing sport，we need more air. When we go to sleep，we need less air. We live in air，but we cannot see it. We can only feel it when it is moving. We must keep the air clean. We should go to school on foot or by bike every day.
()1. Air is around us everywhere.
()2. We can live with no food or water.
()3. We need more air when we run.
()4. We live in air and we can see it too.
()5. To keep the air clean，we should walk or ride to school.

1. T
2. F
3. T
4. F
5. T

1. 根据短文“Air is around us as we walk and play. When we sit down，it is around us. When we go to bed，air is also around us. We live in air.”可知空气时刻在我们周围，与句子内容相符，填T。
2. 短文提到“We can live with no food or water for a few days”，并非完全不需要食物或水就能生存，句子内容不符，填F。
3. 短文指出“When we are doing sport，we need more air”，跑步属于运动，所以跑步时需要更多空气，与句子内容相符，填T。
4. 短文明确“We live in air，but we cannot see it”，句子说能看见空气，内容不符，填F。
5. 短文最后提到“We must keep the air clean. We should go to school on foot or by bike every day”，on foot对应walk，by bike对应ride，与句子内容相符，填T。