补全对话，根据对话内容，补全对话，使其完整通顺，每空一词。

A: Excuse me. 1______ can I get to the nearest post office?

B: Walk 2______ this street and turn left. Then turn right 3______ the second crossing. You'll see it.

A: Is it far 4______ there?

B: Not very far. It's about ten minutes' walk.

A: Thank you very much.

B: You are 5______.