when the traffic_____(stop),you can cross the roads

when the traffic_____(stop),you can cross the roads （get)to the zoo,turn left when you come to the cross roads. ( ) when you cross the road. ( )when you cross the road. You can cross the street at a green light and you must stop you can cross the road You can cross the road in____(安全)when the traffic light turn When the traffic light is(gr ),you can cross the street. you can cross the street＿＿(only ∕just)when the traffic light You can go ____(cross) the street when the traffic lights ty Be_____(care)when you cross the street. Please drive ( ) when you cross the street.