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9. - Chuyên đề Câu điều kiện - Ôn thi vào 10

Chuyên đề Câu điều kiện - Ôn thi vào 10

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9. ____________, the accident would not have happened yesterday

A. If Nam drives more carefully

B. If had Nam driven more carefully

C. Had Nam driven more carefully

D. Unless Nam had driven more carefully