Now the air in Yancheng is _______ than it used to be . Something must be done to stop it .
There are ________ books in the National Library.
It is going to be ________ tomorrow.
The small local school in Parkville ____________five years ago.
It’s polite ______ “Thank you” when you receive something from someone.
What kind of food is______ , Chinese food, Japanese food or the western food?