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МатематикаВопрос:
3. Sarah (read) since 4 o'clock.
Ответ:
Решение:
Здесь используется Present Perfect Continuous, так как действие (чтение) началось в прошлом (в 4 часа) и продолжается до сих пор.
Sarah + has been reading.
Sarah has been reading since 4 o'clock.
Ответ: has been reading
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