根据对话内容，在空白处填写适当的话语（话语可能是一个句子，也可能是一个短语或一个词），使对话完整。 A: Good morning, Lin Tao. The summer holidays will begin. Where are you going to 1 your summer holidays? B: In Dalian. A: In Dalian? What are you going to do there? B: I'm going to 2 the English Summer Camp(英语夏令营）. A: How are you going there? B: By plane.  If I take  a  train, I'll have to change the trains in Beijing. A: You're right. 3 ? B: It is CA551. A: What time wi11 the plane 4 ? B: At 9 o'clock. A: How soon will you get to Dalian? B: In about one and a half hours. A: How fast the plane is!B:  It would take me about 24 hours by train. A: I hope 5 . B: Thank you very much．