问题补充：
---Could you tell me?
---More than a year.
A. how soon will Yangzhou-Taizhou Airport be built
B. how long has Yangzhou-Taizhou Airport been in service
C. how soon Yangzhou-Taizhou Airport will be built
D. how long Yangzhou-Taizhou Airport has been in service
答案：
A. how soon will Yangzhou-Taizhou Airport be built
B. how long has Yangzhou-Taizhou Airport been in service
C. how soon Yangzhou-Taizhou Airport will be built
(答案→)D. how long Yangzhou-Taizhou Airport has been in service
解析：英语宾语从句中一般用陈述语序。How long多长，多用来提问长度或者时间的长短；how soon多久，多用来提问将来的时间。根据下文，一年多。可知上文提问的是时间长短，选项C为倒装语序，故选D。
