Identify the kind of modal auxiliary used in each sentence. Write a, b, or c in each blank.

a. Expressing ability
b. Expressing expectations
c. Expressing preferences

1		The train ought to be in by 9:00.
2		How long should it take us to get to the station?
3		Most working people can get a credit card.
4		Last year I could speak English. The year before I couldn't.
5		I'd like to visit New York City.
6		I would rather travel in the United States than spend a lot of money on clothes.
7		A permanent resident is able to work.