问答题 Collaboration (This part will take about 5 minutes.) Discussion Topic: Water shortage Now, (say the names of candidate A and candidate B) here is a list of causes for water shortage (Hand out the list to the candidates and let them read it through) what do you think the main causes of water shortage I’d like each of you to choose three from the list and tell each other why, if you had different opinions you may argue and you may also add your own ideas that are not listed here. You just talk to each other and I won’t join you. You have 5 minutes. All right. Would you begin (The interlocutor may sit back and intervene only when necessary.) Causes for Water Shortage: ·Low price of water ·Growth of population ·Waste of water ·Polluted rivers ·Climate ·Lack of advanced technology Candidate A=A Candidate B=B