在空白处填上适当的单词，使对话意思完整。每空一词

A: What are you doing  vacation, Sandy?

B: I'm going to Tibet for a week.

A: That  interesting！What are you ?

B: I'm going hiking in the mountains. about you, Tony? are you doing for your vacation?

A: I'm  my friend in Hong Kong.

B: Oh yeah? How are you staying?

A: for four days. I don't like going away too long.

B: Well, have a good time. Show me your photo    we get back to school.