第1个回答 2017-04-23
5 years ago, my homtown wasn't so beautiful. the sky was gray, all plants were covered with dust, the river was green and nobody swim in the river. . People always ware face marsk when they went out.
After a five years environmental remediation, the sky became blue, the plants became green, the river became clear and kids swimming on the river. People do have to ware face marsk anymore.本回答被网友采纳