It's dangerous in here.Keep off.这里的It是什么啊?

Don't play football in the s( ) .It's dangerous. _____(out)It's dangerous to play in the street Don't swim in the l___ alone.It's dangerous. Don't swim in the river a( ) .It's dangerous it's dangerous _____(chase)each other in the corridor. It's danger 还是 It's dangerous It's dangerous in here.Keep off.这里的It是什么啊? --Let's( )in the river!--No,it's dangerous.是swim还是swimming Please tell the boys never ___(play)football in the street.it's too dangerous. Don't play in the street.It's dangerous.回答是什么 We can not play football in the s----,it is dangerous. it's,play,still,they,very,although,dangerous,in the street（连词成句） It's very dangerous to swim in a d____ river.中应该填什么? 选择合适的单词填写在横线上You()walk in the road.It' s dangerous. Don't____the street.It's dangerous.(across) It’s dangerous.改成否定句 It's dangerous.(改为否定句） Don't b_____the paper.It's dangerous.