Choose the right option to fill in the gap:
1. You … to get the necessary books.
a) must b) will have c) can d) may
2. I … to meet my brother at the station.
a) can b) should c) may d) have
3. We … wait for her any longer.
a) can b) must c) can`t d) should
4. … you start working immediately?
a) have b) can c) may d) ought
5. … I ask you to do me a favour?
a) may b) will be able c) have d) should