听下面一段材料,回答第1-3题。 1. What's the scientist's topic? A. The climate in the future. B. The weather at present. C. Our environment pollution. 2. Where will the fresh water come from? A. Rainfall. B. Iceberg. C. Sea water. 3. What will the sea level be like in the future? A. It will down. B. It will rise. C. It will be the same as now.