What events do you have ____________ your school?A.for B.on C.at
_______ there any orange juice at home?
-_______ do you have an English party? -Once a month.
We never celebrate Christmas, _______ they do it every year.
What's wrong with my son's_______? He can't see things clearly.
-How long does it_______ you to ride a bike to school? -About 20 minutes.