填入一个适当的词补全对话，每空一词。

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

B: Jim is out. May Ia message for you?

A: OK, please. Jim and I tried out for an adventure (冒险) tour competition on the Internet a week ago. Today I was told that we were accepted.

B: Oh, that must be dangerous. What do you want to do it?

A: We want to do sports and something exciting.

B: You'dnot. We will worry about you.

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

B: Are you ready for it?

A: Yes,ready for it.

B: Good luck.

A: thanks.

B: It's OK. I'll tell him to call you back later.