文档介绍：Unit 2 Saving the Earth Topic 2 All these problems are very serious.
Section D
Grammar
Indefinite Pronoun and Adverb
_______of us likes pollution.
Don’t spit ___________ in public.
_________ should care for wild animals and plant more trees.
We should do ___________ we can to protect the environment.
None
anywhere
Everyone
everything
Functions
______ a result（结果）, a lot of rich land has changed _________ （变为）desert.
Trees can stop the wind from ______ the earth _____(吹走）.
We shouldn’t leave rubbish ___________(到处).
All these problems are very serious,_____(所以) we must do something now.
into
blowing
away
here and there
so
As
1a Read the passage and put the following paragraphs in the correct order.
( ) The sea seems to have the best answer. There is plenty of water in the sea. But we need to take the salt away from the sea water. This is very expensive. If scientists can find cheaper ways to do it, we can solve the problem of the shortage of water.
( ) How can we avoid a serious water shortage? First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large cities are reusing their water. But people’s need for water is increasing day by day. We still don’t have enough water. What else can we do?
( ) Although the world is hungry, it is even thirstier. While nearly ¾ of the earth is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground.
1
2
3
名词
avoid 代词
动名词
，避免
，找到
Language points
. He avoided answering my questions.
不定式不可以做宾语。
1. How can we avoid