Do you think of white when someone talks about a polar bear? In fact, the polar bear does not have white fur. It just appears to be white. Polar bears have a very good sense of smell. It helps them to find food. During summer, polar bears sleep longer, because they are able to find food more easily at night. Usually, after a meal, polar bears have a short sleep. A polar bear can have 2 to 3 babies at a time. They don't leave their mothers until they are about 2. 5 years old.

However, polar bears will die out soon because of people. There are about 20,000 polar bears in the world. The ones that are left are trying to survive today. The number of polar bears is becoming smaller and smaller because of the loss of sea ice-polar bears mostly inhabit(居住于) the sea ice, not the land ice. This is happening because of global warming(全球变暖), pollution, hunting and so on.

Ordinary people don't care., but great people have the power and want to save tigers, fight for giant pandas and save polar bears. Ordinary people will wait, but great people will find a new world. Join me and save the polar bears, and, of course, the tigers, the giant pandas and'. . .

1.According to the passage, which of the following does NOT make sea ice less?

A. Global warming B. Pollution.

C. Hunting. D. Travelling.

2.What can we learn from the passage?

A. The polar bear's fur is white.

B. Perhaps the writer will drive his car less.

C. It's harder for polar bears to find food in summer.

D. The polar bears have a good and happy life.

3.What does the underlined word "Ordinary" mean in Chinese?

A. 勤劳的 B. 聪慧的 C. 普通的 D. 坚强的

4.What is the main idea of this passage?

A. To show that the number of polar bears is getting smaller.

B. To tell people that polar bears will soon have nowhere to live.

C. To let people know why polar bears are in danger.

D. To talk about polar bears and suggest that people should protect animals.

5.Where can this passage come from?

A. A magazine about animals.

B. A book about greetings.

C. A poster about working plans.

D. An instruction book.

I am Grace Cortese,and I am 10 years old.I believe I can make a difference in ______ the environment,because my science teacher,Mrs.Esby,tells us that there are many things we can do to help protect the environment ______ we are willing to change our habits.

Every year at my birthday party,I ______ charitable donations instead of gifts.When I was eight,I asked my friends to donate to the Natural Resources Defense Council to save the polar bears.I ______ almost $150.Last year,my friend,Mary,also did that.Imagine how much money we could raise to save the environment if everyone asked for charitable donations ______ their birthdays!

My whole ______ is doing things to help protect the earth,too.Our school makes a carpooling(合伙用车)program to reduce the number of cars on the road,and we have a “Walk to School” day once a year.______ science teacher,Mrs.Esby,has a “Teenie Greenies” club at lunch and she teaches a class on how to recycle after school.And we ______ do beach clean-up.

If you ______ to do something for the environment,look through the website Grades of Green.It is ______ of great ideas for us to reduce,reuse and recycle waste,and it also has a lot of really interesting facts.

1.A. using B. protecting C. cleaning D. preventing

2.A. even if B. until C. because D. if

3.A. ask for B. look for C. pay for D. send for

4.A. sold B. borrowed C. raised D. rented

5.A. to B. for C. with D. off

6.A. school B. home C. factory D. office

7.A. Her B. His C. Your D. My

8.A. still B. yet C. also D. already

9.A. want B. consider C. enjoy D. refuse

10.A. short B. full C. tired D. fond

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