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МатематикаВопрос:
They have already left, ? (a) do they? (b) haven't they? (c) have they? (d) doesn't it?
Ответ:
Решение:
Утверждение в настоящем совершенном времени (Present Perfect) с 'have'. Вопросительный тег должен быть в той же форме, что и вспомогательный глагол, но с отрицанием, если утверждение положительное. Следовательно, 'have' становится 'haven't', и используется местоимение 'they'.
Ответ: (b) haven't they?
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