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Exercise "Preposition + V-ing", created by anonyme (a free exercise to learn English):
Results of the 18 308 people who have taken this test:
Average mark: 61.5 / 100 Share
Latest member with a 100/100 (perfect mark): stupefaite / POLAND, on Sunday 12 March - 18:13:
"Good job"
They got a perfect mark
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