To our anger, many poverty-stricken counties build luxurious office buildings instead of _______ money to improve the miserable conditions of local schools.
--- What do you think we can do for our parents?
---You _____ do anything except to be with them and be yourself.
A. don't have to B. oughtn't to c. mustn't D. can't
-- Do you still remember when you first met John?
--- I can’t quite remember, but I’m sure it was ______ Friday afternoon because we were at ______ school for a meeting.