__________ may I keep these books?-Twice a week.[ ]

______ do your family usually have dinner? —At 7:00 p.m. [ ]

What do you want to be when you ___________?—I want to be a pilot.

You should do the things worth ____, and if you have difficulty _____ them, you can turn to your family.

The man_____your good friend will try my best to help you out.[ ]