It is very dangerous to swim in the river.What can stop them

It is very dangerous to swim in the river.What can stop them To swim in this river is very dangerous(用IT作形式主语改写句子） the river is dangerous.you ___ swim in it .A.can't B.mustn't The river near our village is（ ）.It is dangerous to swim in its dangerous to swim in the river for it is deep A 10-metre It is dangerous for little children to swim in the river.为什么 in,is,swim,children,to,river,the,dangerous,it,really,for the deep river is dangerous ().to swim;to swim in;swim in;sw 根据题意改写句子1To swim in this river is very dangerous.( 用it作形式主语改 The river is too dangerous.You can't swim in it.合并两个句子为1句 It's very dangerous to swim in a d____ river.中应该填什么? It can swim in the river.It is f( )