— You must _________ your son.— Oh, I see.He must make mistakes at school again.
My uncle is used to for the children in poor areas.
Our teacher told us in the class.
——Did you go to Jack’s birthday party?——No, I _________.
——Must we finish the exercise today?——No, you________.
Your pocket money can be used to _____ charity, you used to _______ a lot on snacks.