I ______ a set of keys. Are they your keys, David?
I don’t like swimming at all. I _____ go swimming.
---How often do you exercise? --- ________.
The dining hall__________ from 11:00 to 12:30 on weekdays.
It’s time _______ Lily_______ her little dog now.
Miss Wu teaches _______ Maths. She’s nice _______ everyone.