—Could you tell me ?—More than a month.A. when was Yangzhou-Taizhou Airport built B. how o

问题补充：

—Could you tell me ?

—More than a month.

A. when was Yangzhou-Taizhou Airport built

B. how often you go to Yangzhou-Taizhou Airport

C. how soon will Yangzhou-Taizhou Airport be built

D. how long Yangzhou-Taizhou Airport has been in service

答案：

A. when was Yangzhou-Taizhou Airport built

B. how often you go to Yangzhou-Taizhou Airport

C. how soon will Yangzhou-Taizhou Airport be built

(答案→)D. how long Yangzhou-Taizhou Airport has been in service

解析：本题考查宾语从句。首先，根据宾语从句的语序应用陈述句式，可排除A、C两项；其次，根据答句句意：一个多月，表示对一段时间提问，可知本题的引导词是how long，故选D。