1. Bob and Mary can ride a bike. 2. Stop at the traffic lights. 3. Use the handgrips when there are no free seats on the bus. 4. Always wear a seat belt when you travel by car. 6. Walk on the pavement, not the road. 7. That man is a pilot. He can fly a plane. 8. My little sister can't ride a bike. 9. His brother is very young. He can't drive a car. 10. Can your father sail a boat?