听录音,选择相应的答语,将其序号填入题前括号里。
( ) 1. A. I clean the blackboard. B. I'm cleaning the blackboard. C. I cleaned the blackboard.
( ) 2. A. Yes, he did. B. No, he doesn't. C. Yes, he is.
( ) 3. A. We never watch TV. B. We sometimes play football. C. We often play football.