---Could you tell me _______?---More than a month.A.when was Yangzhou-Taizhou Airport builtB.how often you go to Yangzhou-Taizhou AirportC.how soon will Yangzhou-Taizhou Airport be builtD.how long Yangzhou-Taizhou Airport has been in service
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D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。