选择合适的句子补全对话。

A. I'm watching TV. B. What time? C. See you at4:00. D. What are you doing? E. At 4:30 this afternoon.

A: Hello!

B: Hi, it's Lucy.

A: I reading a book. What about you?

B: Let's go to see a film, OK?

A: Good!

B:

A: OK.