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Unit2 Topic2 All these problems are very serious.
Section C
【学习目标】
By the end of the lesson,students should be able to:
Words and phrases:hole,form,rise,oxygen,ozone layer,radiation,directly,carbon
dioxide,blanket,escape,the greenhouse effect,refer,during this
period,take away,pass through
Sentences:
(1)Forests have become deserts,so more and more sorts of animals and plants are
disappearing.
(2)As a result,many rivers and lakes are now dead.
(3)Too much harmful radiation from the sun passes through the hole and
reaches the earth directly.
(4)It causes the level of the oceans to rise and the climate of the earth to change.
(5)When it rains or when the wind blows,the earth is taken away.
(6)The heat from the sun can't escape,so the temperature is rising
Grammar:indefinite pronoun and adverb
2.Difficult points
理解有关环境方面的专业术语。
能读懂与环境问题相关的科普类文章。
能运用所学知识,写出谈论环境现状的文章。
【预习导学】
必备单词、短语和句子
1.
拿走
2.
n.氧气
3.
n.洞,坑
4.
臭氧层
5
n.放射,放射物
6.
adv.直接地
7.
二氧化碳
8
n.毛毯.毯子
9.
n.&v.逃跑:逃脱(from)
10.
V.上升,上涨
11.
温室效应
12.
提到,涉及,有关
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13.章走
14.温室效应
15.避免犯错误
16.The government is doing something useful to protect the environment.
17.
We shouldn't leave rubbish here and there.
【探究提升】
Section C
1.We have changed our planet a lot in many ways.
作主语.There is a lot to see at the party.
作名词短语
作宾语,He's given her a lot to eat.
作表语.This is a lot.
常十todo作后置定语。
a lot
作副词短语,表程度.“很.非常”。Do you wear your new watch a lot?
前可被such.what,quite,rather修饰。I like him quite a lot.
a lot of lots of n./n.There's a lot of work to do and a lot of people have
been sent there.
2.Some things we have done are very good for the earth while others are bad.
whle并列连词“但是,而,然而:表示转折关系
引导时间状语从句,“当时候:所引导的从句只表示时间段。
3.All over the world,people have cut down millions of trees.
cut down砍下
cut过去式和过去分词均为cut:现在分词:cutting
拓展cut off切断(电源.水).中断
The phone line was cut off during the storm.
cut up
切碎He cut the old tree up
cut sth.into pieces把某物切碎
4.To