听录音,根据所听内容,选择正确的答案。 ( ) 1. A. They're blue. ( ) 2. A. At five o'olock. ( ) 3. A. Yes, we can. ( ) 4. A. It's mine. ( ) 5. A. No, they aren't. B. It's blue. B. In the afternoon. B. No, we can't. B. They're Wang Ping's. B. No, they're cousins. C. They're black. C. On the playground. C. That's all right. C. They're new. C. Yes, they are.