补全对话
A: Excuse me. Can you tell me the _1_ to the post office?
B: Of course. It's _ 2_ here. Go to the corner and _ 3 _ left. The post office is _4_ the end of the street. You can't _5 it.
A: Thank you very much. I'm _6 I'll find it.
B: 7_ is one important thing I _8 to tell you.
A: __9_ that?
B: Today is a holiday. The post office is _10_ .
1.______ 2.______ 3.______ 4.______ 5.______
6.______ 7.______ 8.______ 9.______ 10.______
