学校放暑假了，Liu Xin一家准备明天去海南游玩。下面是Liu Xin和爸爸的聊天记录，请你选择合适的选项将他们的对话补充完整。

Dad:  

Liu Xin: Hooray! By train or by plane?

Dad:

Liu Xin: That's great.

Dad: And we're going

to visit lots of beautiful places (地方). But now it's nine o'clock.

Liu Xin: OK. Good night, Dad.

Dad: Good night.

A. What are we going to do there? B. Time for bed. C. We're going to Hainan tomorrow. D. We're going to swim in the sea. E. We're going there by plane.