你是一名学生,上个星期天,为了保护环境,与老师和同学开展了一系列志愿者...答:2, do not lose a grain of rice, white rice, delicious, we eat forget people farming, each one metre is not easy, soybean grain of sweat in return, good children must cherish it.3, not in the tree to carve, you see, you carve in the tree, tree water as in tears, ...