I was told that although these old buildings the Qing Dynasty they remained in good con

问题补充：

I was told that although these old buildings the Qing Dynasty, they remained in good condition.

A. are dated back to

B. dated back to

C. dating back to

D. have dated back to

答案：

A. are dated back to

(答案→)B. dated back to

C. dating back to

D. have dated back to

解析：考查非谓语动词。有人告诉我尽管这些就大楼可以追溯到清朝，但是他们仍旧保持这良好的状况。过去分词表示主语发生过的被动的动作，和主语是动宾关系。结合语境大楼是被记载的对象，故选B。