Someting we should or shouldn't do and can or can't do

In Library :

1. You aren't supposed to noisy in library
2. You are supposed to read book in library
3. You are allowed to borrow book in library
4. You aren't allowed to bring food to library

In Tram :

1. You are expected to give your sit to expectant mother
2. You aren't to sit on folding chair 
3. You are allowed to talk with your friends
4. you aren't allowed to bring your pet

In Museum :

1. You are supposed to learn history in museum
2. You aren't supposed to  touch fossil
3. You are allowed to take a picture of fossil
4. You aren't allowed to wreck fossil

In Restaurant :

1. You are allowed to ask menu to waitress
2. You aren't allowed to smoke in restaurant
3. You are supposed to eat in rastaurant
4. You aren't supposed to leave without pay the bill

In Classroom : 

1. You are supposed to bring note to class
2. You aren't supposed to play your phone when lecture is teaching
3. You are allowed to ask your lecture if you still not understand
4. You aren't allowed to ask your friends during exam