A  rainfores（雨林）is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below 16℃.Rainforests have a great effect on the world environment because they can take in（吸收） heat from the sun and adjust （调节）the climate. Without the forest cover, these areas would reflect more heat into the atmosphere，warming the rest of the world .Losing the rainforests may also influence wind and rainfall patterns, potentially causing certain natural disasters（灾害） all over the world.
In the past hundred years, humans have begun destroying rainforests in search of three major resources (资源): land for crops, wood for paper and other products, land for raising farm animals. This action affects the environment as a whole. For example，a lot of carbon dioxide(二氧化碳)in the air comes from burning the rainforests. People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit（受益）.
There are two main reasons for this. Firstly, when people cut down trees, generally they can only use the land for a year or two. Secondly, cutting large sections of rainforests may provide a good supply of wood right now, but in the long run （长远看）it actually reduces the world’ s wood supply.
Rainforests are often called the world’s drug store. More than 25% of the medicines we use today come from plants in rainforests. However, fewer than 1% of rainforest plants have been examined for their medical value. It is extremely likely that our best chance to cure diseases lies somewhere in （在于）the world’s shrinking rainforests.
【小题1】.．Rainforests can help to adjust the climate because they________.

教育部三令五申要求各地学校减轻学生负担，可你们学校为了片面追求升学率，不惜牺牲学生仅有的周末时间进行补课，为此上周你们班利用班会时间举行了一次题为“周末是否应该补课”专题辩论，请你以李华的名义根据下表中的内容写一篇书信寄给“21st Century”报的编辑。?

注意:1.信的开头已经为你写好，但不计入总词数。?

2.可以根据需要适当发挥，要有你自己的观点。?

3.词数：100左右。?

4.生词：调节 adjust?

Dear Editor,

Our class had a serious argument about whether we should have lessons on weekends in the class meeting last week. Now I'm writing to tell you the detailed information about it...

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

教育部三令五申要求各地学校减轻学生负担，可你们学校为了片面追求升学率，不惜牺牲学生仅有的周末时间进行补课，为此上周你们班利用班会时间举行了一次题为“周末是否应该补课”专题辩论，请你以李华的名义根据下表中的内容写一篇书信寄给“21st Century”报的编辑。?

注意:1.信的开头已经为你写好，但不计入总词数。?

2.可以根据需要适当发挥，要有你自己的观点。?

3.词数：100左右。?

4.生词：调节 adjust?

Dear Editor,

Our class had a serious argument about whether we should have lessons on weekends in the class meeting last week. Now I'm writing to tell you the detailed information about it...

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

A  rainfores（雨林）is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below 16℃.Rainforests have a great effect on the world environment because they can take in（吸收） heat from the sun and adjust （调节）the climate. Without the forest cover, these areas would reflect more heat into the atmosphere，warming the rest of the world .Losing the rainforests may also influence wind and rainfall patterns, potentially causing certain natural disasters（灾害） all over the world.

In the past hundred years, humans have begun destroying rainforests in search of three major resources (资源): land for crops, wood for paper and other products, land for raising farm animals. This action affects the environment as a whole. For example，a lot of carbon dioxide(二氧化碳)in the air comes from burning the rainforests. People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit（受益）.

There are two main reasons for this. Firstly, when people cut down trees, generally they can only use the land for a year or two. Secondly, cutting large sections of rainforests may provide a good supply of wood right now, but in the long run （长远看）it actually reduces the world’ s wood supply.

Rainforests are often called the world’s drug store. More than 25% of the medicines we use today come from plants in rainforests. However, fewer than 1% of rainforest plants have been examined for their medical value. It is extremely likely that our best chance to cure diseases lies somewhere in （在于）the world’s shrinking rainforests.

1..．Rainforests can help to adjust the climate because they________.

2..．What does the word “this” underlined in the third paragraph refer to?

3..What might be the best title for the text?