The population of the Earth is growing faster. It is important that we look after the Earth. We need it!

The Earth gives us a lot of things. We also give the Earth a lot, but some of the things are not good.

In nature, when something dies, other animals and plants get food from it. Every animal or plant gives food for other animals or plants. However, animals can’t get food from many of the things that we ‘give’ the Earth. Animals and plants can’t eat metal, plastic and glass. These things will stay in the ground for many, many years.

Some rubbish is very dangerous for plants and animals. In some places, many animals live together. One animal makes food for many more animals. If we put rubbish and chemicals in the water, the plankton(浮游生物) can die. If there isn’t any plankton, many animals have nothing to eat.

    So what can we do? Don’t leave any rubbish in the countryside! Don’t make so much rubbish!

1. The Earth gives us ___________.

A. food           B. rubbish      C. chemicals          D. pollution

2.When something dies in nature, _________.

    A. water and grass are polluted             B. plastic and wood become food

    C. other animals and plants get food        D. metal and glass stay in the ground

3.We must _______ to look after the Earth.

    A. put metal in the ground              B. use more wood

    C. keep frogs in the water              D. make less rubbish

Do animals have a culture? What do we mean by "culture"? Recently social scientists have begun to ask if culture is found just in humans, or if some animals have a culture too.  When we speak of culture, we mean a way of life that a group of people have in common. Culture is the forms of behavior (行为)hat help people to live together. It is also the forms of behavior that make one group of people different from another group.

     Human beings use tools, cooperate with one another, and communicate with language.  But these aspects(方面) of human behavior, or "culture", can also be found in the lives of certain animals, Animals can make tools, for example. We used to think that the ability to use tools was the dividing line between human beings and other animals.  Lately, however, we have found that this is not the case. Chimpanzees(黑猩猩) can not only use tools but actually make tools themselves. Animals can also share knowledge with each other and use their own language to communicate. So it may be important for us to know that the line dividing us from animals is not as clear as we used to think.

1.According to the article, "culture" means         

          A. the languages we learn            

B. the good habits we' share with each other

          C. the forms of behavior we have in common

2.From the fact that chimpanzees can use and make tools，we know         

          A. animals may have a culture like our own

          B. animals can be as clever as human beings

          C. animals have the ability to help human beings

3.Which of the following statements is TRUE according to the article?

          A. Chimpanzees never help each other.

          B' Animals use their own language to communicate.

          C. People from different places have the same culture.

4.The traditional idea about dividing animals from human beings is that         

          A. human beings can use tools       

B. human beings can depend on each other

          C. human beings have the language to communicate

5.The main idea of the article is that         

        A. the animal culture is different from the human culture

        B. knowledge and communication are no longer signs of only human behavior

        C. the line dividing human culture from animal culture is not as clear as we might think

Dogs like living with people. A dog can be a very good friend. He can do a lot of things for people. Some dogs help people to look after sheep, other dogs help them to find lost children. And some of the dogs can help the blind (盲人) do things.

Many years ago there was a very good dog. His name was Seeing Eye dog. Now we can see this kind of dogs all over the world. They are working for the blind.

The Seeing Eye dog is strong, good and easy to train(训练). He helps the blind to walk from place to place.

Before a dog becomes a Seeing Eye dog, he must go to a training school for about three months. First the dog has to learn to sit or stay when he hears the trainer’s call. In his next lesson the dog learns to make his trainer across busy streets.

The dog has many things to learn. And in every lesson he must learn to do one thing again and again for many times.

At the end of the training school he must take tests. When he passes the tests, the Seeing Eye dog will do the things by himself.

Now he can help blind people. The new master may be a man, a woman, or even a child. It takes the dog and his blind master about a month to learn to work and live together.

1.We can see the Seeing Eye dog _______.

A．only in the country                      B．only in small cities

C．all over the world                       D．only on the busy street

2.What can the Seeing Eye dog do?

A．Look after sheep.                       B．Help blind people.

C．Find lost children.                       D．Train blind people.

3.If you want a dog to become a Seeing Eye dog, you must let him ________.

A．go to a training school                    B．go to a middle school

C．go to an evening school                   D．go to a children school

4.First the dog has to learn to sit or stay __________.

A．when he hears the telephone call

B．when he hears another dog’s call

C．when he hears the master’s call

D．when he hears the trainer’s call

5.How long will it take the dog and his blind master to learn to work and live together?

A．One year.         B．Five years.         C．About a month.     D．One week.