选择句子补全对话。

A：    1 (      )    . Can you tell me the way to the Children’s Hospital, please?
B：Sure.    2 (      )     and turn right between Book Store and Library.
The white building is the Children’s Hospital.    3 (      )    
A：   4 (      )     . By the way,    5 (      )     .
B：About half an hour.
A：OK. Good-bye.