请教gwd1-20

Q20:

Rivaling the pyramids of Egypt or even the ancient cities of the Maya as an achievement, the army of terra-cotta warriors created to protect Qin Shi Huang, China’s first emperor, in his afterlife is more than 2,000 years old and took 700,000 artisans more than 36 years to complete them.

A.   took 700,000 artisans more than 36 years to complete them

B.   took 700,000 artisans more than 36 years to complete it

C.  took 700,000 artisans more than 36 years to complete

D.  700,000 artisans took more than 36 years to complete

E.   to complete them too 700,000 artisans more than 36 years

这里的is和took时态不对称啊！难道是习惯用法？

１、“兵马俑已有2000多年的历史了”，这是一般陈述，用现在时

２、 took 700,000 artisans more than 36 years to complete them

“当年70000人力，耗时36年才修建完成”，是2000年以前的事，当然用过去时