---Excuse me, are you waiting for the bus?---Yes, I am. But the bus is so late. ______, how can I get to the No. 1 Middle School?A.In the wayB.On the wayC.Out of the wayD.By the way
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D解析从整个语境中可以看出，所填部分为一独立成分，是引起所问的问题的插入语，故应用by the way，意思是“顺便问一下”。