——Why should I correct that mistake right now, Mum? It’s OK, I think..——Well, honey, it will _______ big trouble in the future.
--- What’s three and four?--- ______.
Look, his hat is ______ the floor(地板).
Are those your ______?
This isn’t ______ eraser. ______ is in the pencil box.
My English teacher is Mary Smith and we call her ______.