3. Your brother is looking for his passport. You think it's in the bedroom. A It needs to be in the bedroom.
B It must be in the bedroom.
C It can't be in the bedroom.

4. Yuo have lost your bag in the airport. Your dad gives you some advice. What does he say?
A You must talk to the airport staff.
B You may talk to the airport staff.
C You should talk to the airport staff.