Teacher Li: Tell me something about the earth. What does Earth look like?

Student :Like a ball. It’s round.

Teacher Li:Good. Why do we have day and night? Can anyone tell me?

Student :Because in the day, the sun shines on our half of the world and at night in shines on the other half.

Teacher Li:That’s right. Do you know how many countries there are in the earth.

Student :There are about more 200.

Teacher Li:Which ones do you know?

Student :I know there are China, UAS, Britain, Japan, France.

Teacher Li:Any other else?

Student :Yes, German, India.

Teacher Li:Very good. You can find more on the map after class, and tell your classmates.Including the name the country, the capital, the national flag, the national anthem, and the center city of economy, culture etc.