根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。

A: Excuse me, how can I get go the bookstore?

B: It's far away here.

A:

B: It's about 10 kilometers.  You need to take a bus.

A:

B: The No.  18 bus.

A:

B: It's over there.  You should go across the bridge.

A:

B: You're welcome.