__________at the door before you enter the office，or you’ll be considered impolite

repeat the address: 758 Maple Street. Maple, M-a-p-l-e.—_______. Thank you.

What troubled the teacher was that no one present made an answer when asked who had broken the glasses, so he didn’t know who .

It remains to be seen ____ he will solve the problem or not.

Our head teacher ,Miss. Liu often tells us _______ loudly in the classroom.