I was reviewing Official Guide and came across this question. Do not the two verbs in a compound sentence have to agree in tense(Parallelism)?
The answer is (A). Thanks for your clarification.
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.
Let's strip away everything from the sentence so we can better understand what's going on here.
"..., the army of terra-cotta warriors ... is more than 2,000 years old and took 700,000 artisans more than 36 years to complete."
Now we have the basics here. We can see that we have two verbs: "is" and "took." Now, it's great that you are thinking about parallelism here, but actually these two parts are parallel. Parallelism applies to the structure of the sentence, the order of the words, not the tenses. Since we are talking about two different events in time, we need to use two different verb tenses. The first verb is in present tense because the author is stating a fact about the army. The second verb is about something that was done in the past and ended in the past. So we only need a simple past tense verb to convey this idea.
I hope that you find this explanation helpful.
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