补全对话。用适当的单词填空，使对话完整。

W: Summer vacation is coming. Where would you like to go, Jack?

M: Well, I'd like ___1_  _ my grandparents in Dalian.

W: Really? Dalian is a beautiful city.     2      are you leaving?

M: I'm leaving next week. What about you, Mary?

W: Oh, I'd like to go sightseeing in Sichuan.

M: That's great. Sichuan is a good place to travel.     3   _ are you going there?

W: By train.      4     the way, how long are you staying in Dalian?

M: For three weeks. Who will you go with?

W: My parents. They are     5     teachers. They are free m summer vacation.

M: Have a nice vacation!

W: You, too!