Do you think of white when someone talks about a polar bear(北極熊）? 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 their food more easily at night. Usually, after a meal, polar bears have a short sleep. A polar bear can have 2-3 babies at a time. They live with their mothers until they are about two-and-a-half years old.

However, polar bears will die out soon because of people. There are only 20,000 to 25,000 polar bears in the world. The polar bears 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 (全球氣候變暖), 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. For me, I will not waiting. I will take the bus more often from now on. Join me and save the polar bears, and, of course, the tigers, the giant pandas and...

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

A．Global warming. B．Pollution.

C．Hunting. D．Travelling.

2.which is right of the following sentences?

A．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．Polar bears have a good, happy life now.

3.What does the word "ordinary" mean in Chinese?

A．勤勞的 B．聰慧的

C．普通的 D．堅強的

4.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

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