单选题 The original building was erected in 1710, but this structure has been largely transformed and extended, the present hotel ______ in 1910.
A. was completed B. to have been completed
C. having been completed D. completed

【正确答案】 C

【答案解析】[解析] 从标点符号看，逗号后面的内容只是句子的一个成分，而不是一个独立的句子，因为没有连接词。因此，应选非谓语分词形式。此外，句中已给时间状语1910，所以用完成式表示complete这一动作发生在过去。