You may use room as you like ____ you clean it up afterwards[ ]

I have two grammars, ______are of great use.

You needn’t take your shoes off when you enter someone’s house in Australia , _____ , of course , they’re very dirty

I seem to be lost. Could you tell me _____—Sure. You can take the No.3 bus to get there.

Excuse me, is there ______ bank near here —Yes, go ahead. You can see one over there.