选择合适的一项，补全对话

A. Can I have some cake? B. Thank you. C. How many candles? D. Yes, of course. E. Yes, you can.

Sarah: Can I come in?

Tom:

Sarah: Happy birthday to you, Tom.

Tom:

Sarah: Wow, a big birthday cake!

Tom: Sorry, you can't. We must wait a minute.

Sarah: Can I have some milk?

Tom:

Sarah:

Tom: There are ten. I'm ten years old.