I interpret them to mean different things. One talks about the event as it happened in the past. One talks about the event as it's still happening.
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November 14, 2019
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Suburbs are smaller rural neighborhoods within a city. Countryside usually means somewhere far from a city with a lot of trees and nature. Outskirts usually means a place on the outside edge of somewhere.
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November 14, 2019
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For me - 5 is perfect, 3,4 is understandable but could use improvement, 2 I can guess 1-2 options, but is unclear, 1 is completely incorrect.
a. 2
b. 4
c. 3
d. 5
e. 5
f. 5
g. 2
h. 5
(cooperation)
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November 14, 2019
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As a native speaker the first one sounds a little awkward maybe, but everyone will understand you. The second one is better. I understand them to mean the same thing.