人教版九年级全册Unit13 We're trying to save the earth!Section B(1a-1e)课时作业（含答案）

Unit 13 We're trying to save the earth.
第三课时 Section B (1a-1e)
一、根据句意及汉语提示填写单词。
1. Everyone knows things in blue rubbish bins can be (回收利用).
2. My mother doesn't have her (自己的) car. She shares one with my father.
3. If you have to cough,use your (餐巾纸) to cover your mouth.
4. It's helpful to the environment to use public (交通工具).
5. My brother is taking a (淋浴) in the bathroom now.
二、根据句意，用括号内所给单词的适当形式填空。
1. It is very important (recycle) paper and books.
2. We should use (reuse) bags instead of plastic bags.
3. You should turn off the shower while you (wash) your hair.
4. Many animals are facing danger! The situation won't change unless humans stop (kill) them.
三、完形填空。
What does the word "ecology"mean It was 1 by Ernst Haeckel, a German biologist. He joined two Greek words: "oikos", meaning "house", and"logie", meaning "the study of". Together they mean "the study of the house". The"house" Haeckel had in mind is our 2 Earth. Earth is home for all living things-humans, animals, plants, and even tiny microbes.
To study a house is to learn how its residents(居民) use it. An ecologist is a scientist who studies the 3 between organisms(生物) and their environment.The environment is an organism's surroundings. It may 4 water, gases, rocks,and temperature.
Ecologists also study the balance of using the environment while protecting it.An ecologist once asked a boy 5 he thought it meant to protect the environment.
The boy said, "You go into the forest and look for somebody who wants to cut down a tree. You take away his axe. You tell him about how 6 trees are. You say they are good for natural beauty, saving soil, and giving shelter to birds and other animals.
"Good answer," said the ecologist," 7 it may not be easy to find a woodcutter to talk to. Also, remember that sometimes it's 8 to cut down a tree.If we cut down too many trees, the forest will disappear. If we don't cut down any trees, we won't get any resources from the forest. We have to find the right 9 ."
"I get it," the boy said. "We need the forest's10for wood and paper or we might not have desks or notebooks for school."
"Exactly-and school is a good place to learn about ecology, added the ecologist."Then you will know how to protect the natural environment."
( )1.A.proved B.invented C.marked D.accepted
( )2.A.planet B.building C.project D.surface
( )3.A.feeling B.relationships C.distance D.competitions
( )4.A.pollute B.control C. include D.reduce
( )5. A. who B.whose C.why D.what
( )6.A.wild B.common C.wealthy D.important
( )7. A. but B.and C.so D.or
( )8.A.comfortable B.tiring C.impossible D.necessary
( )9.A.mystery B.temperature C.balance D.symbol
( ) 10. A. soil B.resources C.landscape D.wildlife
参考答案
一、1.recycled 2.own 3.napkin 4.transportation 5.shower
二、1.to recycle 2.reusable 3. are washing 4.killing
三、1-5 BABCD 6-10 DADCB