people must _keep the environment clean_ (提问）

people must _keep the environment clean_ (提问） Sometimes people pollute the environment.划线提问 Sometimes people pollute the environment. we must take some measures to prevent the environment being We must try our best to stop the environment pollution____a we must put rubbish bins and keep the environment 英语翻译In my opinion,to protect environment,the government must factories must stop ___________ the environment A polluting We have rules (to take care of the environment).（对括号内内容提问） People must down the trees People shoud be p___ from polluting the environment. Animals ____ (die )if people keep polluting the environment