2016-2017学年 人教版 必修三 Unit 4 Astronomy :the science of the stars grammar课件 (15张)
2016-2017学年 人教版 必修三  Unit 4 Astronomy :the science of the stars grammar课件 (15张)第2页

1. Do people take good care of the earth? 2. What do people do to the earth? Can you give an example? 3. Critical reading: “Thus they (people) have, in their turn, become the most important animals on the planet.” Do you agree?

Para. 5:

The _________of humans and their _________on the earth.

Main idea:

arrival

impact