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Exercise "Prefixes", created by anonyme (a free exercise to learn English):
Results of the 4 544 people who have taken this test:
Average mark: 49.5 / 100 Share
Latest member with a 100/100 (perfect mark): stupefaite / POLAND, on Thursday 10 August - 18:35:
"Pratice makes perfect"
They got a perfect mark
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