二、单项填空(共15分)21. ---I’m sorry I shouldn’t have laughed at you the day before. --- _________ .
—May I ask you something about the accident? —Sure. ___________!
Seeing the _____ dog, the little boy stood there with a _____ expression on his face.
Almost _______ of the students in this class wear glasses, that is, _______ of them.
Thewe recycle, the we waste.
He ____ a good idea at the meeting.