––Have you returned the book to the library _______? ––Yes, I have _________ returned it.
_____ useful advice she gave you! You should listen to her.
Have you ever been to ______ aquarium in Qingdao before?
Li Yuchun is______ girl that most of the students are her fans.
This sweater is not as good as that one, but it’s much_________.
My mother often _______some money _______some useless things.