Exercise 4. Rewrite the sentences using the modals in parentheses. 1. It is possible that Mark is in the bedroom. (may) ________________________________________________________________________________ 2. It isn’t permitted to eat in the classroom. (must not) ________________________________________________________________________________ 3. Natalie had the ability to play the piano when she was younger. (could) ________________________________________________________________________________ 4. It’s advisable to dress warmly because it’s cold outside. (should) ________________________________________________________________________________