把下列短语分成危险和安全两类
| A.play football in the street | B.use the sidewalk |
| C.play with the fire | D.climb the tree |
| E.wait for green light | F.play football in the playground |
| G.stop when the light is red H.run down the stairs |
【小题1】Safe:_____________________________________________________
【小题2】Dangerous:____________________________________________