A sign is another kind of language.There're some of them that you see on the road.Now choose the right answres to match the signs.For example: There is a bend on the road.It's not safe to go round a bend very fast. When drivers see this sign,they can leave the expressway from here.The road gets narrow.drivers must go slowly and carefully.
Drivers mustn't go at a speed of over forty kilometers one hour.We can see it near a town.We are near a crossing,so we should drive carefully!There is another road coming in from the right.If a driver leaves the car here,a policeman may write down the number of his car.