根据问句选择正确答语。 ( ) 1. Who are you? ( ) 2. Where does flour come from? ( ) 3. Where are you going? ( ) 4. What can you see in the picture? ( ) 5. How do we save water? A. First, do not waste water. B. I'm going to the sky. C.I can see some trees, some clouds and some birds. D. I'm Mr. Wind. E. Flour comes from wheat.