Vocabulary and Grammar

If I ________ that Brian had to get up early, I would have woken him up

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If I ________ that Brian had to get up early, I would have woken him up.

know

knew

had known

will know

Giải thích

Đáp án: C

Giải thích: câu điều kiện loại 3

Dịch: Nếu tôi biết Brian phải dậy sớm, tôi đã đánh thức anh ấy