Answer:
With unemployment running at 11%, the city government essentially <u>bankrupted</u>, and the population actually <u>was falling</u> as young people <u>left</u> in droves, there were few bright spots in Bartovia’s future.
One of the few, however, <u>was</u> a new venture run by Sergio Leone, a nano-chemist who had returned to the city of his birth to try and made the impossible a reality.
Explanation:
This text is written in the past tense, so we should put all the tenses into the past tense. We use the Past Simple to describe finished actions in the past (bankrupted) and to express finished actions that we have introduced with another tense (in this case, past continuous).
We use Past Continuous to talk about an ongoing past action, interrupted by another action (expressed in the simple past).
