摘要：31．Trees cool the air as well as it．

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阅读理解： 
      The date palms(枣椰树)are wonderful trees. People eat trees. They feed them to their animals.
They use the leaves and wood to build houses. They use the wood to build boats. They make baskets
from the leaves. They burnt the other parts of the trees to cook food.
      The date palms came from the Middle East. Seven thousand years ago people in Sycria and Egypt ate dates. They made pictures of the date palms on their buildings. Today the date palms grown in the Middle East, parts of Asia and Africa, southern Europe, and other warm parts of the world.
      There are more than 27 hundred kinds of palm trees. Most of the trees can't grow in the Middle East, because it is too dry. But the date palms grow well there.     
1. People make boats from the ________ of the date palms.   
A. leaves
B. wood
C. dates
D. flowers
2. The date palms come from ________.    
A. Asia
B. Africa
C. warm parts
D. the Middle East  
3. People eat ________.

A. flowers
B. dates
C. leaves
D. other parts of the date palms 

4. Today the date palms grow in ________.
A. the land of the North Pole
B. northern Europe
C. the warm places
D. the cool places  
5. People use ________ of the date palms.
A. the whole
B. no parts
C. the leaves and wood
D. the fruit and leaves
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阅读短文，然后根据内容完成问题。

　　Dr Ray：Then you must thank trees for that, too．Trees are natural air conditioners．(A)他们吸掉空气中的废气，然后把氧气释放到空气中。How many people are there in your class, Judy?

　　Judy：Forty-six．

　　Dr Ray：Well, one and a half hectares of trees could produce enough oxygen to keep your whole class alive and healthy for a year．

　　Judy：That's wonderful．

　　Dr Ray：(B)Trees cool the air as well as clean it．(C)Three trees can do the job of 15 air conditioners running almost all day．

　　Judy：You certainly know a lot about trees, Doctor Ray．

　　Dr Ray：Thank you, Judy, but I don't, really．Scientists are only now beginning to understand them．(D)________, did you know that when insects attack a tree, it can warn its neighbours? The trees can then protect themselves by producing a chemical that makes their leaves taste nasty．And some trees can join their roots together underground, and pass food and water around．Trees are communicating with one another, but we don't know how．

　　Judy：Are trees in danger?

　　Dr Ray：In great danger．We cut down and burn millions every year but we replace hardly any of them．We are destroying our best fighters against pollution．

1．将(A)译成英语：________

2．将(B)部分转换成：Trees ________　________ cool the air ________　________ clean it．

3．将(C)部分翻译成汉语：________

4．在(D)处填上一个合适的词语：________

5．找出文中描写树对空气作用的两个词：________　________

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阅读理解

　　Do you know something about tree rings(年轮)? Do you know they can tell us what the weather was like, sometimes even hundreds of years ago?

　　A tree will grow well in a climate(气候)with lots of sunshine and rainfall．And little sunshine or rainfall will limit(限制)the growth of climate by studying the tree rings．For example, to find out the weather of ten years ago, count the rings of a tree from the outside to the inside．If the tenth ring is far from the eleventh ring, then we’re sure that it was sunny and rainy most of that year．If it is near to the eleventh ring, then the climate that year was bad．

　　Tree rings are important not only for studying the history of weather but also for studying the history of man．Many centuries ago there lived a lot of people at a place in New Mexico．But now you can find only sand there－no trees and no people．What happened?

　　A scientist studied the rings of dead trees there．He found that the people had to leave because they had cut down all the trees to make fires and buildings．As all the trees had gone, the people there had to move．

(1)

________ in good climate．

[　　]

A．

Tree rings grow far from each other

B．

Tree rings become thinner

C．

Trees don’t need sunshine or rainfall

D．

People can cut down most of the trees

(2)

The scientists are interested in studying tree rings because tree rings can tell ________．

[　　]

A．

whether a tree was strong or not

B．

whether people took good care of the trees or not

C．

whether the climate was good or not

D．

how old the trees were

(3)

If you want to find out the weather of twenty years ago, you should study ________．

[　　]

A．

the twentieth ring

B．

the tenth ring

C．

the nineteenth ring

D．

the twenty-first ring

(4)

Why did people usually live in places with lots of trees?

[　　]

A．

Trees could tell the change of the weather

B．

Trees brought lots of sunshine and rain

C．

Trees could make weather not too hot or too cold

D．

Trees could be used for burning and for building house

(5)

The people had to leave the place in New Mexico because ________．

[　　]

A．

had weather stopped the growth of trees

B．

they no longer had water and the land became sand

C．

they didn’t have enough trees for burning

D．

there was too much rain there

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It is said that another acre of the world’s forest will be destroyed forever. Why is this happening? There are two reasons — land and wood. In many countries the trees have been cut down because the land was needed for animals or crops. In other parts of the world the trees are cut down because their wood is wanted. This wood is used by local people for firewood or it is used for building. But many people don’t know that in most places the trees won’t be replaced. The soil in the forests is very thin, but it is protected by the trees. When the trees are cut down, the soil is washed away by the rain or blown away by the wind. Soon nothing can be grown on it. The  forest becomes a desert. Then more land will be needed, and more trees will be cut down.
When the forest is destroyed, it isn’t only the trees that are lost — the homes of millions of animals and plants are destroyed, too. All kinds of animals are in danger — fish，reptiles, birds, mammals, insects, and shellfish — as well as thousands of plants.
Who is to blame for this? The answer is simple: all of us. There are just too many people in the world. The world’s population is now six billion. Of course, it’s very easy to blame the local people. We don’t cut down trees. They do. But the products are bought by people like you and me — wood houses, beds, tables, chairs, paper… Why are the forests being destroyed? Just look around. You are probably using it right now.
【小题1】People cut down large areas of trees in order to _________.
A．grow cropsB．keep animalsC．build housesD．get land and wood
【小题2】 In most places, __________after trees are cut down.
A．new trees can grow betterB．forests will become deserts
C．most animals can live thereD．people build new house there
【小题3】 According to the passage, we should  _________________ to protect the forest.
A．use fewer wood productsB．plant more trees
C．blame the local peopleD．protect the soil
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What does the sign(标识) say?

1. Do not cross here. Use the subway.
2. PRIVATE FISHING   Keep to footpath away from water.
3. University Park. Opening hours: Apr----Sept: 6:30am- 9:30pm.
Oct--- Mar: 8:30am-4: 30pm.
4. FIRE! DANGER TO TREES   Don’t smoke here.
5. Slow down! Children Crossing.
6. No horses or bikes. Walkers only.
7. Tents one night  $ 10 -one or two people.
$ 15-family size.
8. SHEEP. Please close gate. Keep your dog on the head.
9. NO SWIMMING. When the red flag is flying.
【小题1】What time does the University Park open in March?
A．At 6:00 amB．At 6:30 amC．At 8:00 amD．At 8:30 am
【小题2】Which sign tells you not to smoke?
A．Sign 2B．Sign 4C．Sign 6D．Sign 8
【小题3】Where can you see Sign 9?
A．On the playgroundB．At the school library
C．Near the swimming poolD．In the computer room

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