从对话后的方框中选择适当的选项补全对话。

A：Summer vacation is coming．____1____

B：Well，I'd like to visit my grandparents in Dalian．

A：Really? Dalian is a beautiful city．When are you leaving?

B：I'm leaving next week．____2____

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

B：That's great．Sichuan is a good place to travel．How are you going there?

A：By train．By the way，how long、are you staying in Dalian?

B：For two weeks．____3____

A：My parents．They are both teachers．They are free in summer．

B：____4____

A：You，too!