the air would be hard to breathe为什么不用被动答:wash, clean, cook, eat, drink, brew, fry, bake, iron, cut , dye , dry,sell,read,write,teach,translate,record,wear,draw,drive,ride,lock,unlock,close ,shut ,open, break, smoke, play, act, wind up, make up, blow, keep, burn, light , strike(划着), fire , pull, fill...