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МатематикаВопрос:
10. Eighty years ago, there ... an airport on the island. a) weren't b) isn't c) wasn't
Ответ:
Правильный ответ: b) isn't
Объяснение: В предложении речь идёт о том, что сейчас нет аэропорта на острове. Форма "isn't" (is not) используется для выражения отрицания в настоящем времени для единственного числа.
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