unit13导学案(第6课时)

第六课时 (3a - Self Check)

一．重点短语

1.停止乘小汽车

2.回收纸

3.对...有害

4.好好利用

5.由...制成

6.空气污染

7.噪音污染 8.回复，归还

9.什么的数量 10.拆下

11.越来越遭 _____ 12.在食物链顶端

13.拯救地球 __ 14.扔掉，抛弃

二．完形填空.

It’s very important that we all recycle. In nature, everything _1_ again. For example, when an animal dies, it becomes ___2_ animal’s food. Nothing is wasted. But humans have created things like plastic bags __3__ can’t be broken down by nature. Our rubbish kills animals and ___4__ water and soil. __5__

we continue making too much rubbish, the problem will only worse. If nature can’t reuse the rubbish, we must recycle _6____. We should clean up the rubbish we’ve made because nature can’t.

Recycling is also the right thing to do for another reason .The earth is rich in natural materials like water and trees, _7_ these materials are not endless.

We use up our natural materials much __8____ than the earth is able to reproduce them. For example, each year we cut____9__ more than 6,000 square miles of forest. But it takes an average of 25 year for a new tree __10_____.

Recycling can help us save the earth, so let’s take action now.

( ) e B. using C. is used ed

( ) 2.A.another B.other C. others D. the other

( ) 3.A.who B.which C.how D.where

( ) 4.A.pollutes B.polluted C.polluting D.is polluted

( ) 5.A.When B.Whether C.Why D.If

( ) 6.A.them B.their C.it D. Itself

( ) 7.A.but B.so C.and D.or

( ) 8.A.fastly B.fast C.faster D.fastest

( ) 9.A.out B.down C.in D.up

( ) 10.A.grows B.for growing C.growing D.to grow

三．阅读理解.

Think of all the things you throw away：juice bottles，soda cans，candy covers．It adds up．How much rubbish do you produce? Americans throw away about 1 ton of rubbish per person every year．That's 2000 pounds of rubbish!

Most of the rubbish gets covered in big holes in the round called landfills(垃圾掩埋法)．

A lot of this rubbish can be recycled，or turned back to something useful．The main things we recycle today are made from metal，paper．

People recycle for many reasons．One of the main reasons is to protect resources(资源)．Making new cans out of old ones means less aluminum(铝) is needed for new cans．The main things we recycle today are made from metal，paper． This leads to a second reason people recycle：it saves energy．Recycling

old aluminum cans take much less energy than making new aluminum．To make new aluminum，you need to mine metal ore(矿石) from the ground，remove it，and refine it，into a finished metal.

Recycling also protects valuable land．By recycling，we produce less rubbish．That means fewer landfills are needed for dropping our rubbish． Because metals are some what costly to make，they are the world's most recycled materials．About two-thirds of all steel(钢) is recycled． Almost all drink cans are made of aluminum．Americans recycle about one-third of their used aluminum cans．Empty cans are sent to special factories．There，they are cleaned，melted，and made into new pieces of aluminum．

Americans use lots of paper —mostly in the form of newspapers，magazines，and cardboard boxes．In fact，paper takes up more space in landfills than any other material．

Old paper can be cut and made are into new paper．Americans recycle a little more than one-third of their paper rubbish．New papers are made from trees，each ton of recycled paper saves about 17 trees!

( )1.You can most probably read the passage in _______．

A. A science book

B. A Chinese book

C. A history book

D. A choreography book

( ) 2．The underlined word "recycle" in the second paragraph means ________． A．销毁 B．收集 C．熔化 D．回收利用

( )3．Why do people recycle rubbish?

A. To protect resources because it's hard to make new resources．

B. It can save energy，because the resources are limited(有限)．

C．To protect valuable land，because there is no place to bury rubbish．

D．To protect resources，save energy and protect valuable land．

( )4．Which one is right?

A. People recycle paper from the tree.

B. Papers make up less space in landfills.

C. Americans recycle a little more than 1/3 of their paper rubbish．

D. To recycle paper can't protect their environment．

( )5.The main idea of the passage is _______．

A. To let us know it is a big job deal with rubbish.

B. To explain the reason for rubbish recycle.

C. To describe know to recycle metal, paper.

D. To explain how to recycle rubbish and why to do so.

感谢您的阅读，祝您生活愉快。