a scrap of paper
...the backs of envelopes, the fronts of envelopes, scraps of paper, even pencil-friendly tabletops. Generally these calculations...
... and vegetables every day ? (4)Christina got a (scrap of paper),(piece of paper),(note) from her teacher.
...我看過，They give us the virulent product, we give them pile of scrap papers. 也沒有這段，你自己去check看看！ P.S They give us...