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Parker’s first Antarctic expedition in 2009,
took place
has taken place

when he only fourteen.
was
has been

He first to trek to the North Pole at the age of fifteen.
tried
has tried

But since that expedition, he the trek twice.
completed
has completed

In April 2010 he the first person to check in at the North Pole via Foursquare.
became
has become

He numerous talks on the issue,
gave
has given

and in August 2012 he at the prestigious TEDx conference in Belgium.
spoke
has spoken

He articles for The Huffington Post, The Independent and TheNew York Times.
wrote
has written

There is more ahead for this inspiring teenager and the world the last of Parker Liautaud yet.
hasn't heard
didn't hear

ReyCh23    3   02.04.2020 12:42    3