— Did you go to the exhibition on May 18th?— Of course. There were many kinds of Taiwan fruits ______.A. on show B. on duty C. on business
_______ weekdays we go to school _______ seven o’clock.
--- Are these your books? --- No, _____ aren’t. _____ books are in the bag.
_____ your sister have a ball or a bat?
Saturday is the _____ day of a week.
I watch TV _____ two hours on weekends.