听下面一段材料，回答1-4问题。 1. Where can we find water? A. We can find water only in rivers and seas. B. We can find water only in the air. C. We can find water almost everywhere. 2. Is water needed everywhere? A. Yes, it is. B. No, it isn't. C. We don't know. 3. What are clouds made of? A. Seas, rivers and lakes. B. Snow and ice. C. Very small drops of water. 4. What is the best title of the passage? A. Water in river. B. Man needs water. C. The importance of water.