Ответ:
- When on the street, 19) look both ways before crossing.
- When on the bus, don’t 20) talk to the driver.
- When you enter the bus, don’t 21) push others.
- When on the bus, don’t 22) lean out of the window.
- When going to school, 23) walk on the pavement.
- When you ride your bike, 24) wear a bicycle helmet.
Ответ: 19 — look; 20 — talk; 21 — push; 22 — lean; 23 — walk; 24 — wear.
