Lesson One
Translate the followings:
1. Good morning.

2. Good day!

3. Good evening.

4. Good night.

5. sleep well.

6. Hello.

7. Two ways to say "Hi":
7.1 
7.2 

8. Hi, how are you?

9. formal Goodbye.

10. Three ways to informally say "Goodbye":
10.1
10.2
10.3

11. see you later