问题补充：
in , the Beijing-Shanghai high-speed railway has benefited Qufu a lot.
A. To complete
B. Completing
C. Having completed
D. Completed
答案：
A. To complete
B. Completing
C. Having completed
(答案→)D. Completed
解析：考查非谓语。句意：在建完之后，北京通上海的高铁对曲阜带来很多益处。A. To complete 动词被动式位于句首做目的状语，为了 B. Completing doing做状语和句子主语必须是主动关系 C. Having completed doing的完成式表主动且先于位于动词发生 pleted done做状语和主语是被动关系，根据本题句子主语是铁路和完成之间是被动关系，所以D正确。
