1 . Listen to the first part and fill in the blanks.

What on Earth Are We Doing to Our Planet?

Our planet’s     1     is dying out at an alarming rate. Between 150 and 200 species are becoming extinct every day. This mass extinction is caused by hunting, habitat     2    , and pollution. We must make people aware of the problem and help     3     the endangered wildlife before it’s too late!

3 . 听下面一段对话，填空。
But it was a close thing — all the men voted for the ________, which are quite expensive to adopt.

4 . 听下面一段对话，补全句子。
M: The trouble with humans is that we want to control everything. Yet I wish we could learn to live     1     nature.
W: Well, you’re right. We are the     2     who regularly take more from the nature than we need.

5 . 听下面一段对话，补全句子。
M: Meat production is one of the worst things for the environment. People cut down ancient forests to     1     cows, just to produce hamburgers!
W: Yes. I don’t eat meat at all, because I don’t want to     2     innocent creatures.