In the past 300 years, more than 130 species of animals have become extinct. One of these extinct species is the passenger pigeon(旅鸽). At one time there were millions of these birds in North America, but now there are none. The last one died in the Cincinnati Zoo in 1914. Another extinct animal is the cape lion(西非狮). The animal has been extinct since 1860.
What cause animals to become extinct? Too much hunting is one cause; pollution is another.
Governments around the world have begun to protect wild animals in danger. In the United States, the US Fish and Wildlife Service is responsible for(承担义务)endangered animals. It has listed nearly 200 species of endangered animals in North America.
The underlined word “extinct” in the first sentence probably means “         ”.

A．ill	B．dying out
C．becoming	D．changing

There were many cape lions in North America          .

A．last century

B．in the twentieth century

C．more than one hundred years ago

D．in 1914

       isn’t the reason for the extinction of wild animals in North America.

A．The pollution	B．Too much killing
C．Too much hunting	D．The war

Three are        species of wild animals in danger listed by the US Fish and Wildlife.

A．less than 130	B．about 200
C．over 300	D．nearly 300

The best title of this passage should be “       ”.

A．A sad story

B．Endangered animals in North America

C．Wild animals become extinct

D．The US Fish and Wildlife Service