听力原文： Good afternoon, and welcome to England. We hope that your visit here will be a pleasant one. Today, I would like to draw your attention to some of our laws. The first one is about drinking. Now, you may not buy alcohol in this coun- try if you are under 18 years old, nor may your friends buy it for you. Secondly,noise. Enjoy yourselves by all means,but please don't make un- necessary noise, particularly at night. We ask you to respect other people who may wish to be quiet. Thirdly, crossing the road. Be careful since the traffic moves on the left side of the road in this country. Use the crossings for walking and do not take any chances when crossing the road. My next point is about litter. It is against the law to throw away waste mate- rial 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. Finally, as to smoking, it is against the law to buy cigarettes or tobacco if you are under 16 years old. I'd like to finish by saying that if you need any sort of help or assistance, you should get in touch with your local police station. Now,are there any questions? How many laws are there discussed in the speech?