<span>Past perfect tense is used in this case. This is due to the fact that the events are not in normal chronological order. This tense is used to differentiate when the events happened and put them back into proper order.</span>
The answer is C: Republic. In the sixth century, Rome became a republic.
The benefits of having more than one narrator include having more opinions and more than on side of a story.
<span>D. imperturbable
In the passage, the correct word is "imperturbable". This is an adjective simialr to "calm"</span>
20. B. saw
21. D. Worked
22. C. Had flown
I hope this helps :)