Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
George wouldn't have met Mary________to his brother's graduation party.
A. if he has not gone
B. had he not gone
C. if he shouldn't have gone
D. hadn't he gone
Đáp án là B. Đảo ngữ câu điều kiện loại III: Had+S (+not ) +P2, S + would + have + P2.