用所给动词的适当形式填空,完成下面对话。
Marie: Hello! May I speak to Karen?
Karen: Hello! This is Karen. How are you, Marie?
Marie: I'm fine. What (be) you (do) now?
Karen: I (study) science. What about you?
Marie: I (clean) my room.
Karen: Hey, do you want to go to the cinema?
Marie: That sounds boring.
Karen: I (call) Lucy just now. She (swim) this afternoon. Do you like swimming?
Marie: Sure. Why not go with her?
Karen: That's a good idea!