Such as drive one day less let father, let my mother buy yourself clothes less, let the students use wastepaperbag book, use less paper napkins, multi-purpose small handkerchief.
比如让爸爸少开一天车，让妈妈少给自己买衣服，让同学用废旧的报纸包新书，少用餐巾纸，多用小手帕。
2
He picked up a piece of wastepaper, and put it into the rubbish bag.