— Do you know in ancient China?— I have no idea. But I know people once used tree leaves to make paper.
________ of them has his own opinion.
The box is_______ heavy for the girl _______ carry.
He may come,but I'm not sure ______ that.
—Why not _______more milk ______the coffee?—That sounds great.
—- Would you like some milk? —Yes, just________.