If you meet trouble, you can ______ your friends ________ help.
_______ 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.