Jeff Corwin is a scientist and writer. He does these jobs with one life goal help save animals and their habitats. His latest book, 100 Heartbeats:  The Race to Save Earth’s Most Endangered Species. Is a collection of stories about animals on the edge of extinction . Corwin recently talked to a reporter.
Reporter: How would you describe your job?
Corwin: My job is to travel around, look at animals and tell their stories.
Reporter : When did you know this is what your wanted to do?
Corwin:  I knew that when I was 6 years old. My dad was a police officer, and we lived in the city. I really enjoyed the time when I could go to the quiet countryside. One day I saw my very first wild snake and I knew that’s what I would do for the rest of my life. I didn’t know if I would be a teacher or a zookeeper, but I knew I would have a life connected with nature.
Reporter: Why did you write the book?
Corwin: We are losing species very fast. I wanted to show people that while we are in a very serious situation, we are not at the point of no return. If we make big changes, we may have the chance to save what remains.
Reporter: Is it true that humans are the reason that many of these animals are in danger?
Corwin: Human beings have a powerful effect on every other living thing. It’s important to make that effect a positive one.
根据材料内容选择最佳答案，将其标号填入题前括号内。
What’s the main idea of the passage?
Corwin lived in the city when he was young.
Corwin has been trying his best to help save animals and their habitats.
The first time Corwin saw the wild snake, he knew what to do for the rest of his life.
Corwin hoped people can protect the animals to make our earth more beautiful.
Jeff is a ___________.

A．teacher	B．zookeeper
C．writer	D．police

The underlined word “extinction ” means “_____________”.

A．灭绝

B．生存

C．冬眠

D．饥饿

What does the underlined sentence mean?

A．Human beings are now in danger.

B．We can’t save the endangered species.

C．Humans can’t deal with serious situations

D．We can make some changes to save the endangered animals.

Jeff’s life goal is to ______________.

A．protect the environment

B．do some scientific research

C．save animals and their habitats.

D．Let more people know about nature.