HELP PLEASEComplete the sentences with the present perfect or simple past forms of the verbs.
16. Parker’s first Antarctic expedition in 2009, *
took place
has taken place
17. when he only fourteen. *
was
has been
18. He first to trek to the North Pole at the age of fifteen. *
tried
has tried
19. But since that expedition, he the trek twice. *
completed
has completed
20. In April 2010 he the first person to check in at the North Pole via Foursquare. *
became
has become
21. He numerous talks on the issue, *
gave
has given
22. and in August 2012 he at the prestigious TEDx conference in Belgium. *
spoke
has spoken
23. He articles for The Huffington Post, The Independent and TheNew York Times. *
wrote
has written
24. There is more ahead for this inspiring teenager and the world the last of Parker Liautaud yet. *
hasn't heard
didn't hear
16 took place
17was
18 has tried
19 completed
20became
21 gave
22 has spoken
23wrote
24 didn't heard