最佳答案:

　　abc241def563

最佳答案:

　　1. busy，safely，green，man

　　2. Before，first，left

　　3. cross，with，drivers，easily

　　4. play，run，safe

最佳答案:

　　1. —How can we cross the road safely?

　　—We must look for a zebra crossing. We must look at the traffic lights. We can cross the road with other people.

　　2. —What mustn't we do on the road?

　　—We mustn't play football or run on the road.

最佳答案:

　　1. roads　

　　2. zebra，crossing　

　　3. green，man　

　　4. pavement　

　　5. Traffic，lights

最佳答案:

　　1. cross，the，road，wait，for

　　2. must，right，left，other，people

　　3. bike，safe，cars，fast

　　4. zebra，crossing，traffic，lights

最佳答案:

　　1. Because he wants to eat the grass on the other side of the river.

　　2. Because the bridge is too narrow.

　　3. One of them must turn back and let the other cross the bridge first.

　　4. Because they both want to cross the bridge first.

　　5. They both fall into the river.