( ) 1. A. Water pollution. ( ) 2. A. Yes, it is. ( ) 3. A. White pollution. ( ) 4. A. No, they can"t. ( ) 5. A. Yes, she does. | B. Light pollution. B. No, it isn"t. B. Noise pollution. B. Yes, they can. B. No, she doesn"t. | C. Air pollution. C. I don"t know. C. Light pollution. C. I don"t know. C. That"s OK. |