Module 4 The natural world Unit 10 Air知识总结及练习（含答案）

Unit 10 Air
单词、短语
air，factory，clean，everywhere，smoke，fresh，alive，dirty，plant，balloon，hurt，tie，string，
cloth，keep……alive，plant trees，a piece of
句子
It keeps them high in the sky.
★词汇突破★
1.air（名词）空气
The air is fresh.空气清新。
2.factory(名词）工厂
Look at the black smoke from the factory.看那边黑烟来自于工厂。
3.clean(形容词）干净的；洁净的
Trees keep the air clean.树木使空气干净。
4.everywhere(副词）到处；处处
I've looked everywhere for my pen，but I can't find it.我到处找我的笔，但是还是没找到。
5.smoke（名词）烟
Where is the smoke from 烟从哪里来？
6.fresh（形容词）清新的
The air is so fresh here.这里的空气如此清新。
7.alive(形容词）活着的
We all need it to keep us alive.我们需要它来维持生命。
8.dirty(形容词）脏的
It makes the air dirty.它把空气都弄脏了。
9.plant(动词）种植
We should plant more trees and keep the air clean.我们应该多种点树，让空气保持清新。
★句型突破★
It keeps them high in the sky.它使它们高高的在天上。
★知识拓展★
空气污染
air pollution空气污染
fog and haze雾霾
construction dust建筑粉尘
carbon emission 碳排放
vehicle exhaust汽车尾气
harmful substances有害物质
单选题
1. What keeps us alive （ ）
A. Water
B. Fire
C. Air
D. Earth
2. Where does the black smoke usually come from （ ）
A. Trees
B. Factories
C. Plants
D. Animals
3. What do trees do to the air （ ）
A. Make it dirty
B. Keep it clean
C. Make it hot
D. Make it cold
4. Which word means "everywhere" （ ）
A. Somewhere
B. Anywhere
C. Everywhere
D. Nowhere
5. What is the opposite of "fresh" （ ）
A. Dirty
B. Clean
C. Clear
D. Pure
6. What do we call the air that is not clean （ ）
A. Fresh air
B. Clean air
C. Dirty air
D. Pure air
7. What can we do to keep the air clean （ ）
A. Plant more trees
B. Build more factories
C. Drive more cars
D. Burn more wood
8. What is the main cause of air pollution （ ）
A. Planting trees
B. Breathing
C. Burning fossil fuels
D. Drinking water
9. Which of the following is not a source of air pollution （ ）
A. Vehicle exhaust
B. Construction dust
C. Carbon emission
D. Photosynthesis
10. What do we call the substances that are harmful to our health （ ）
A. Harmful substances
B. Useful substances
C. Natural substances
D. Organic substances
11. What do balloons need to keep them high in the sky （ ）
A. Air
B. Water
C. Fire
D. Earth
12. What does "keep...alive" mean （ ）
A. Make...die
B. Keep...living
C. Make...sleep
D. Make...stop
13. What do we call a place where things are made （ ）
A. School
B. Hospital
C. Factory
D. Restaurant
14. What do we call a piece of material used for covering or making things （ ）
A. Cloth
B. Wood
C. Stone
D. Metal
15. What do we call the process of putting trees into the ground to grow （ ）
A. Planting
B. Watering
C. Cutting
D. Burning
易错知识点及练习
易错知识点1: 形容词辨析
易错点: Clean和fresh的区别，dirty的反义词。
练习:
- The air is so ______ here. (fresh)
- It makes the air ______. (dirty)
易错知识点2: 动词短语的用法
易错点: Keep...alive的意思。
练习:
- We all need air to ______ us alive. (keep)
- Trees help to ______ the air clean. (keep)
答案及解析
1. C. Air (空气维持我们的生命)
2. B. Factories (工厂通常会排放黑烟)
3. B. Keep it clean (树木使空气保持干净)
4. C. Everywhere (everywhere表示“到处”)
5. A. Dirty (dirty是fresh的反义词)
6. C. Dirty air (不干净的空气叫dirty air)
7. A. Plant more trees (多种树可以保持空气清洁)
8. C. Burning fossil fuels (燃烧化石燃料是空气污染的主要原因)
9. D. Photosynthesis (光合作用不是空气污染的来源)
10. A. Harmful substances (有害物质对我们的健康有害)
11. A. Air (气球需要空气才能保持在天上)
12. B. Keep...living (keep...alive表示“保持……活着”)
13. C. Factory (工厂是制造东西的地方)
14. A. Cloth (cloth是一块用来覆盖或制作东西的材料)
15. A. Planting (把树种到地里生长的过程叫planting)