【正确答案】Candidate A: The environmental problems arc getting more and more serious these days. If we don't pay more attention to them then we will have an unbearable quality of life.
   Candidate B: Yes. In my opinion, water pollution is one of the most serious problems.
   Candidate A: It is true. Nowadays rivers all over the world are being polluted with garbage and dangerous chemicals.
   Candidate B: The news says that ships contribute to the problem because they rely on rivers to dispose of waste.
   Candidate A: Besides that, oil and other chemicals can kill fish and make water unsafe for drinking.
   Candidate B: That's right. In a word, polluted water is a big problem to everyone. We depend on water to live on.
   Candidate A: I couldn't agree more. Then how to stop water pollution?
   Candidate B: Certain counter measures need to be taken as soon as possible. To begin with, the government of all countries are supposed to formulate rules and regulations to deal with the pollution problem.
   Candidate A: You mean.., like prohibition of cutting down forests?
   Candidate B: Yes. Besides that, we should plant more trees to prevent water loss.
   Candidate A: I think factories in towns and cities must be prohibited from draining waste liquids into rivers before they are totally treated and purified.
   Candidate B: That's right. The most important is that everyone should protect the water in daily life. We shouldn't pour waste water into the river and we should pick up litter around us.
   Candidate A: We should also turn off the tap on time after using.
   Candidate B: Yes. The water problem will be solvable if we all work together.