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МатематикаВопрос:
15. We …….. for three hours before we decided to take a break. A must be trekking B had been trekking C have been trekking
Ответ:
Краткое пояснение:
Краткое пояснение: Past Perfect Continuous (had been trekking) используется для описания длительного действия, которое завершилось перед другим действием в прошлом.
Ответ: B had been trekking
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