Sagot :
bonjour
les fautes sont entre parenthèses; les corrections en caractères gras
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The Oxfam Trailwalker is a challenge that thousands of walkers have successfully taken on (since 2001) since 1981
(faute 1)
Participants have to walk one (thousand kilometres) 100 km (faute 2)
(in a gym), (faute 3) across some rough terrain
so the challenge is (quite easy.) It's a true test of teamwork and
(faute 4) determination
Thanks to this challenge, walkers around the world have raised money
for Oxfam to fight poverty and (schools). injustice
( faute 5)