Don't give hard liquor to people you don't know well.
举一反三
- Most people ... A: don't know what to say. B: don't know if they have a hobby.
- If you don't know what business to start with, you can pick one at will and give it a try.
- If you don’t want anyone to know it, don’t do it.
- You take it if you don’t feel well．
- You can’t speak right if you don’t listen well.