填空（括号内写序号）
1.orange 2.go 3.yellow 4.in 5.on 6.a 7.an 8.road 9 rules 10.boat 11.three 12.there 13.are 14.green 15.stop
You must know the traffic( ) if you walk( )a city.There( )always( )lights for the traffic lights.You can cros the street at a( )light and you must( )at a read light means"Wait".If you drive( )car,you must drive( )the right side of the（）
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