Excuse me, are you waiting for the bus?Yes, I am. But the bus is

Excuse me, are you waiting for the bus?Yes, I am. But the bus is so late. __________，how can I get to No. 1 Middle School?
A、In the way
B、On the way
C、Out of the way
D、By the way
【正确答案】：D
【题目解析】：从整个语境中可以看出，所填部分为一独立成分，是引起所问问题的插入语，应用by the way，意思是“顺便问一下”。