What should we do before meals?What should we do

What should we do before meals?What should we do What should we do before meals? What should we do before meals?的意思是什么? what+should+we+do+before+meals?+如何回答 what should we do? we do should what what should we do before we c_____ the road. what should we do before we travel by plane What should we do before we go to bod? what should we do before we travel by plane? what should we do before we enter a house in what should we do today