听第5段材料。回答第12至15题。
Good morning.and welcome to England.We hope that your visit here will be a pleasant one.Today.1 would like to draw your attention to a few of our laws. The first one is about drinking.so you may not buy alcohol in this country if you are under 18 years of age，nor may your friends buy it for you. secondly，smoking. It is against the law to buy cigarettes or tobacco if you are under 16 years of age.Thirdly，crossing the road. Be careful. The traffic moves on the left side of the road in this country. Use the crossings for walking and don’t take any chances when crossing the road. My last point is about litter. It is against the law to throw away waste material in a public place. When you have something to throw away，please put it in your pocket and take it home，or put it in a litter bin. I'd like to finish by saying that if you require any sort of help，you should get in touch with your local police station，who will be pleased to help you. Now，are there any questions?