【正确答案】 B

【答案解析】[听力原文]
Wang Hua is talking with a foreign student, Peter, about the environment.
Wang Hua: Hello, how long have you been here?
Peter: Actually I planned to come here in November, but my parents suggested that I observe Christmas, so I started in January.
Wang Hua: That"s less than two months. What do you think of here?
Peter: It"s old with a long history. At the first sight, it"s so beautiful.
Wang Hua: Then, what do you mean?
Peter: Yesterday, when I was walking with a Chinese friend along the river, I was surprised.
Wang Hua: Why?
Peter: Living in such a beautiful city, some people seem to be deliberate to throw the wastes or rubbish anywhere they like.
Wang Hua: So this is why some dustbins are standing along the road.
Peter: This is less important. Pollution, yes, air and water pollution can endanger human health and produce harmful effects on living things and other materials.
Wang Hua: It"s a global problem. It has already caught the public attention.
Peter: So, in Europe, environmentalists formed the party and campaigned for the protection of environment.
Wang Hua: Little by little, people have become aware of the problems facing us. Our Chinese government has passed laws to protect our environment.
Peter: The same case in our country. People in the world have begun to know how to value the protection of themselves on the basis of protection of their world.