听音,选出你所听到的句子。 ( ) 1. A. I am OK. B. I am a boy. C. I am a student. ( ) 2. A. The floor is green. B. The floor is blue. C. The floor is white. ( ) 3. A. How nice! B. It's nice. C. What a nice! ( ) 4. A. This is my classroom. B. This is my bag. C. This is my desk. ( ) 5. A. Let's clean the room. B. Let's clean the classroom. C. Let me clean the board.