来自刘纯武的问题
Asweallknow,waterpollutionisbecomingmoreandmoreserious.Somefactoriespouringinthewaterintotherivers.Asaresult,itmakesthewaterdirtyandsmellterrible.Mostoffishinthewaterhavedeadandwecan'tswiminthewater.Waterisv
Asweallknow,waterpollutionisbecomingmoreandmoreserious.Somefactoriespouringinthewaterintotherivers.Asaresult,itmakesthewaterdirtyandsmellterrible.Mostoffishinthewaterhavedeadandwecan'tswiminthewater.Waterisvery___tohumanbeings,soweshoulddoourbesttoproectandsaveit.
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2020-06-14 01:30