【题目】There are many famous cultural relics in our country, many _______ thousands of years ago.
A. dating back to B. date back to
C. dated back to D. were dated back to
在线课程【答案】A
【解析】试题分析：句意：我们国家有很多文化遗迹，很多要追溯到几千年前。这里前面是简单句，因为中间没有连词，所以逗号后面不是句子，而是独立主格结构，用逻辑主语+非谓语动词构成，因为date back to“追溯到”这个词组没有被动语态，所以用现在分词，所以选A。