1 用所给词的适当形式填空。1. There are many busy (road)in the city.2. How can we go to school (safe)?3. I find a zebra (cross).4. Turn right at the traffic (light).5. You mustnt (cross)the road now.6. You must (finish)your homework first.7. To keep (safely),we can wait on the pavement.8. I can see my mother (easy).9. The (child)are playing on the road.10. Its not (safely).11. Follow (he),please.12. You must st
