题目内容：

Four Wild Animal Species Were Endangered

Maybe you can still see them at the zoo. But that doesn’t mean they’re doing alright in the wild.

Tigers

All six tiger species are endangered, with Sumatran tigers and South Chin tigers at a seriously endangered status. The main reasons for their population decline are illegal hunting and destroyed habitats(栖息地), as humans clear forests to gather timber（木材）and build roadways. Only about 3890 tigers presently live in the wild.

Ground squirrels

That’s right, even squirrels are endangered, specifically the San Joaquin ground squirrel. Native to California, USA, these guys have been disappearing since 1979 on account of the construction and human developments going through their habitat. Their total population is unknown , but it could be anywhere between 124000 and 413000.

Giraffes

The International Union for the Conservation of Nature recently put giraffes at a vulnerable status, the level just before endangered. The giraffe population has declined 40 percent in the last 30 years, primarily due to loss of habitat and illegal hunting. Some giraffes are killed just for their tails, which are considered status symbols in Africa.

Asian elephants

The main threat to Asian elephants, one of the most intelligent animals, is their shrinking habitat. As the human population grows, people invade their land to build roads and railway tracks. Elephants in Myanmar are at an especially high risk for being captured and traded or used illegally in the tourist industry. Fewer than 50000 are left on the entire continent.

1.What is the total population of tigers living in the wild?

A. Around 3890.

B. 50000.

C. 124000.

D. 413000.

2.Which of the following is considered one of the most intelligent animals?

A. Tigers.

B. Giraffes.

C. Ground squirrels.

D. Asian elephants.

3.What is the common threat to the four wild animals?

A. Illegal hunting.

B. Disturbed habitat.

C. Developing tourism.

D. Unnecessary construction.

4.Which word can best describe the present situation for protecting wild animals?

A. Satisfactory.

B. Optimistic.

C. Urgent.

D. Stable.