从方框中选择合适的句子补全对话。

A. Good idea. B. It's half past six. C. Can I go out to play football? D. Yes, I can. E. Because it's raining outside.

Son: What's the time, Dad?

Dad:

Son:

Dad: Sorry, you can't.

Son: Why?

Dad: Can you play chess?

Son:

Dad: How about playing chess together?

Son: