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听下面一段材料,回答第1-3题。 1. What are the two speakers mainly talking about? [ ] A. Human activities B. Natural disasters C. Climate 2. How often do floods strike the country? [ ] A. Every year B. Every three years C. Every other year 3. What can we learn from the conversation? [ ] A. The summers are getting less hot. B. The environment is being damaged. C. The floods have been controlled recently.