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Exercise "Future perfect continuous", created by necroboynonoss (a free exercise to learn English):
Results of the 611 people who have taken this test:
Average mark: 62 / 100 Share
Latest member with a 100/100 (perfect mark): samangona / TOGO, on Sunday 28 July - 17:42:
"bravo à toute l'équipe!"
They got a perfect mark
Stats (611 candidates)
Question 1 passed: 69.6 %
Jenny * (to help) her brother since 1:00 PM before he discovers it.
Question 2 passed: 71.4 %
By 2010, my parents * (to live) in Paris for twelve years.
Question 3 passed: 54.7 %
The teacher * (not / take) a class since 2 o'clock.
Question 4 passed: 57.6 %
By next week, Andrew * (not / to drive) his car for two years.
Question 5 passed: 63.5 %
Next month, John * (to work) in this factory for five years.
Question 6 passed: 52.5 %
Derek * (not / to bet) on horse races for 15 years by then.
Question 7 passed: 59.2 %
By the time he finishes the race, Eliot * (to run) more than 30 kilometres.
Question 8 passed: 66.1 %
The workers * (to check) their job before the headman comes.
Question 9 passed: 67.8 %
By the time their mother arrives, John and Sarah * (to cook) for hours.
Question 10 passed: 23.2 %
By the end of the month, this absurd project * (to cost) us £ 2,000.
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