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Exercise "Countable or Uncountable?", created by webmaster (a free exercise to learn English):
Results of the 203 104 people who have taken this test:
Average mark: 77 / 100 Share
Latest member with a 100/100 (perfect mark): maite59 / FRANCE, on Monday 04 May - 15:20:
"merci"
They got a perfect mark
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