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:____________________________________________
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