阅读短文,从A、B、C三个选项中选出最佳答案回答问题或完成句子。

Clothes are traditionally made of natural materials, such as cotton, leather and wool. They are all from plants or animals, but that doesn’t mean they’re friendly to the earth. For example, farmers have to use a lot of chemicals to grow cotton plants.

Scientists are now looking for new ways to make clothing materials. They hope the new materials are both comfortable and good for the earth. Scientists have worked out how to make materials out of corn husks(棉籽), chicken feathers and rice straws.

“They used to be useless things. We always have a problem of how to deal with them,” Yang, a scientist says, “Now, we can turn them into beautiful materials. Chicken feathers are better than other things. They have small air pockets like honeycombs. That means it will be very warm if you use them to make a jacket or sweater, and I think more and more people will like to buy these kinds of clothes.”

1.Clothes are traditionally made of______

A. natural materials. B. chicken feather. C. rice straws.

2.What are the new clothing materials?

A. corn husks and rice straws. B. cotton and wool. C. leather and wool.

3.What does the underlined word “honeycombs” in paragraph 3 mean in Chinese?

A. 鸟巢 B. 蜂窝 C. 渔网

4.Why are chicken feathers better than other materials?

A. They are from plants.

B. They are traditional clothing materials.

C. They have small air pockets like honeycombs.

5.What’s the best title of this passage?

A. New clothing materials. B. New clothes C. Natural materials.

Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing when you are happy.

Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.

Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your house is your territory where only your family and friends are welcome.If a stranger should enter your territory and threaten you, you

might shout. Probably this would be enough to frighten him away.

If so, you have actually frightened the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting (筑巢) season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.

1.Some scientists believe that most of the time bird’s singing is actually _______.

A. an expression of happiness B. a way of warning

C. an expression of anger D. a way of greeting

2.What is a bird’s “territory”?

A. A place where families of other species are not accepted.

B. A place where a bird may shout at the top of its voice.

C. An area for which birds fight against each other.

D. An area which a bird considers to be its own.

3.Why do birds keep on singing at nesting season?

A. Because they want to invite more friends.

B. Because their singing helps frighten outsiders away.

C. Because they want to find outsiders around.

D. Because their singing helps get rid of their fears.

4.How does the writer explain birds’ singing?

A. By comparing birds with human beings. B. By reporting experiment results.

C. By describing birds’ daily life. D. By telling a bird’s story.

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