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Exercise "Permission, Ability, Obligation, Advice...", created by anonyme (a free exercise to learn English):
Results of the 37 658 people who have taken this test:
Average mark: 45 / 100 Share
Latest member with a 100/100 (perfect mark): tahnna / FRANCE, on Thursday 14 February - 10:12:
"nice"
They got a perfect mark
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