We got lost because we forgot to take a map with us.
A. Unless we had forgotten to take the map with us, we would have got lost
B. If we had remembered to take a map with us, we wouldn't have got lost.
C. Had we not forgotten to take the map with us, we would have got lost.
D. If we had remembered to take a map with us, we would have got lost.
Đáp án B
Câu điều kiện loại 3: If+ S+had+PP, S+would+ have+ PP. Nói về những điều trái với quá khứ.
Dịch: Chúng tôi đã bị lạc vì chúng tôi quên mất mang một tấm bản đồ theo.