题目内容：

补全对话。

A: Hello, Jack! 1.________________________?

B: I’m waiting for a taxi. I’m going to the airport.

A: 2._________________________________？

B: I’m going to Beijing to have a meeting. But I’m afraid I’ll be late for my flight.

A: 3.________________________?

B: At 8:50. There’s only hour left.

A: 4.___________________. I’ll take you there.

B: Thank you.

A: 5._____________________.