根据短文内容回答问题。

  Since the earliest times, trees have always been very useful and important to man who made use of them in many ways.Even today trees continue to serve man in many ways.Trees provide man with fruits and building materials in the form of wood.Without trees it would be impossible to build houses, boats and even bridges.Most of furniture such as tables, chairs and beds is made of wood.

  In the tropics(热带地区)where it is very hot all through the year, trees protect man from the terrible heat.They are also useful in preventing good and rich top soil(土壤)from being washed away during heavy rains which are so often in the tropics.If there were no trees or other plants to hold back the soil with their roots, heavy rains would wash away the rich surface(表面)soil that is so important and necessary to people.The result is that the land becomes a desert.

  desert, world, the, many, areas, are, in, there.A long time ago these desert areas must have been very rich areas, but since our ancestors(祖先)in the past had no enough knowledge about science of nature, they nearly cut down all the trees in the areas where they lived and never planted new ones.By and by, the rich surface soil was blown away and washed away by strong wind and heavy rain.In the end the land was turned into useless deserts where nothing could grow.

1.What do trees provide for man?.

________________________

2.What's the Chinese meaning of the underlined word“roots”?

________________________

3.If there were no trees or other plants on earth, what's the result?

________________________

4.Did our ancestors in the past have enough knowledge about nature?

________________________

5.Put the words“desert, world, the, many, areas, are, in, there.”in the correct order.

________________________

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:________ ________

阅读短文,然后按要求完成各题。

  Today, people around the world enjoy chocolate, but scientists found that people first started to enjoy chocolate at least 3,100 years ago in Central America.At that time, people didn't eat it(A)________ a sweet treat.It was a kind of beer-like drink.Only rich people could drink it during celebrations.Scientists found.some pottery vessels(陶瓷器皿)from 1100 BC in Honduras(洪都拉斯,拉丁美洲国家).They studied them and found that there was something left in the vessels.It was a part from the cacao(可可树)plant.It meant that people started to use cacao 500 years earlier than scientists first believed.(B)The first people who used cacao as a drink lived in a small village.The village had about 200 to 300 people, and it is believed they found the way to make cacao drinks(C)by accident.(D)The cacao seeds were used to make drinks for celebrations held by the rich people among the Aztecs.They also used cacao seeds as a kind of money at that time.

  The Spanish came in the 16th century.(E)他们对巧克力饮料非常感兴趣.They brought some back to Europe and the chocolate drink became popular soon.People kept changing it and made it(F)________ more delicious from then on.

1.在(A)(F)处填入适当的词语:________ ________

2.把(B)处翻译成汉语:________

3.写出(C)处的同义词组:________

4.把(D)处改写为:The cacao seeds were used ________ ________ rinks for celebrations

5.把(E)处翻译成英语:________

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