We must prevent people from _(pollute) the river.What _ they _(do) at present?

We must prevent them from_ _ _(制造混乱）. we must prevent soil from washing away 英语改错 We must prevent those children from running on the road就相当于同义改写阿。 We must prevent people from _(pollute) the river.What _ they _(do) at present? We must try our best to prevent the lake from pollution.同义句 We must try our besy to_____the lake _____ ______ _______ 26.27we must do our best to prevent that kind of thing___againa.happeningb.to happenc.happend.happened we must take some measures to prevent the environment being poll. 改为被动.速度,急.考试中. We must do everything possible to prevent such things from___againA.happening B.to happen C.happen选什么为什么? at present there must be nothing we can do to prevent the juvenile crimes怎么不用something that we can do和something which we can do 英语 谁能帮我看一下这句话的结构We must prevent the water from being polluted. 我们必须防止水被污染.prevent ……from 阻止……做某事（这句话是动宾关系）我弄不清楚到底是must还是prevent 是动词,在 We must From now on,I ____(not leave)you alone any more.we must take action _____(prevent)the same thing______(happen)again. To live a happy life,we must take some measures to prevent pollution ___it is too lateA、since B、when C、once D、 before we must try our best to prevent tht flu from spread ____ a happier liftA to living B living C to live D for living选哪个? We must wear special boots to prevent us___-in the air.A.float B.to float C.floating D.floated为什么?怎么翻译? today the forests are getting fewer and fewer .we must ( )down too many trees.A keep people cuttingB prevent people from cuttingC stop people cutting We should prevent fire( )(burn)the house. What should we do to prevent AIDS?