问题描述：
read and think of other ways to prevent littering. 1.Encourage people to set an example for others
1.Encourage people to set an example for others,especially children.
2.Carry a litter bag in a car.
3.Cover open loads on all trucks.
4.
5.
4、5可以填什么啊、高手进啊、
1.Encourage people to set an example for others,especially children.
2.Carry a litter bag in a car.
3.Cover open loads on all trucks.
4.
5.
4、5可以填什么啊、高手进啊、
问题解答：
我来补答展开全文阅读