根据对话内容，在空白处写出恰当的句子，使句子连贯完整。

John: Uncle Smith, this is John speaking. I'm sorry to call up so late, but may I speak to Jim?

Smith: Jim is out. 1_______

John: OK, please. Jim and I applied an adventure (冒险) tour competition on the Internet a week ago. 

Today I was told that we were accepted.

Smith: Oh, that must be dangerous. 2_______ 

John: Because we want to do sports and something exciting.

Smith: You'd better not. 3_______

John: Uncle Smith, don't worry. We can take good care of ourselves.

Smith: 4_______ 

John: Yes. We are ready for it.

Smith: Good luck.

John: 5_______

Smith: OK. I'll tell him to call you back later.