根据对话内容，在空白处写出恰当的句子，使句子连贯完整。 所写句子应与所给的标点一致。（共5小题，每小题1分，满分5分）
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.                 
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.           
John: Because we want to do sports and something exciting.
Smith: You’d better not.            
John: Uncle Smith, don’t worry. We can take good care of ourselves.
Smith:                
John: Yes. We are ready for it.
Smith: Good luck.
John:               
Smith: OK. I’ll tell him to call you back later.