1.Don't throw the paper about.
2.We should protect the plants.
3.We should use more bags instead of plastic bags.
4.We should save water.
5.we should save electricity.
(答案不唯一)
1.Don't throw the paper about.
2.We should protect the plants.
3.We should use more bags instead of plastic bags.
4.We should save water.
5.we should save electricity.
(答案不唯一)