1. can, can't, can't, can
2. sign, belt, lights, crossing, zone, light
3. in, on, by, of, on
4. 1) fly, sail
2) cross
3) drive
4) ride
5. stand, turn right, go down the street, green lights, slow
6. 1) Look both ways before you cross the road.
2) Don't cross between parked cars.
3) Don't ride against traffic.
4) Wear a bicycle helmet.