Crested ibises (朱鹮) are one of the oldest bird species (物种) on Earth. It is believed that they have been around for 60 million years. They were once common in Asia. But in the 1960s, they began to disappear because of pollution and other human activities. In 1981, Chinese scientists found seven of them in the wild in Yangxian, Shaanxi Province. They were believed to be the last ones in the world. But now, they have been saved from extinction.

Researchers say its population has risen to more than 5, 000 around the world. There are 3, 000 crested ibises in Yangxian alone. The birds’ survival (幸存) is because of China’s early protection efforts, according to Zhang Yueming, an expert who helps protect the birds in Yangxian.

On the fourth day after finding the ibises, the local government put up a lot of notices to protect the birds. Then, it stopped people from cutting down trees. Later, it set up the Qinling No. 1 protection station and sent four people to look after the birds day and night. During the daytime, they watched and recorded the birds’ habits and conditions. At night, their job was to keep them safe.

To help the ibises have more babies, a rescue and breeding center (救助和繁育中心) was set up in 1990. At the center, crested ibises are fed by people and can receive timely help when they are sick or hurt. China’s protection of crested ibises is an example in the world's history of protecting endangered wildlife.

根据短文内容，选择最佳答案。
【小题1】What do you know about crested ibises?

A．They only live in China.	B．They can live to be 60 million years old.
C．They were endangered in the early 1980s.	D．They are the oldest species on Earth.

【小题2】What does the underlined word “extinction” in Paragraph 1 probably mean?

A．Living on.

B．Dying out.

C．Getting hurt.

D．Being sick.

【小题3】What’s the number of crested ibises in Yangxian now?

A．2000.

B．3000.

C．4000.

D．5000.

【小题4】Which is the right order of the following facts?
①The local government put up a lot of notices.
②The local government set up a rescue and breeding center.
③The local government set up the Qinling No. 1 protection station.
④The local government stopped people from cutting down trees.

A．①④③②

B．①④②③

C．③①④②

D．③①②④

【小题5】What’s the main idea of the passage?

A．Crested ibises are endangered all over the world.

B．China became the best place for crested ibises to live.

C．The number of crested ibises has increased because of China’s efforts.

D．More and more countries have realized the importance of saving crested ibises.