Unit 5 Developing ideas 3

Guide: Welcome to Amazing Life. Let’s look at this fish from Africa. It has lungs and can breathe air. It can live without water for months. So its name is “lungfish”. OK. Next, let’s...

Visitor 1: Sorry, but could you explain a little more? How do lungfish stay alive?

Guide: In the dry season, they go into the wet earth and sleep. And in the rainy season, they go back into the water.

Visitor 1: Thanks.

Guide: Let’s look at these pictures. Scientists are doing research on lungfish. They study their bodies and behaviour.

Visitor 2: Excuse me. Why do they study lungfish?

Guide: Scientists believe that people developed from fish. So this study can help humans understand themselves. Now, let’s...

Visitor 1: Sorry, sir. Did you say people developed from fish?

Guide: Yes. Long ago, some fish left the sea. They grew lungs and walked on the land. Lungfish are like those fish.

Visitors: Wow!

参考答案：

1. air    2. sleep     3. water     4. bodies     5. sea    6. walked