Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
The book would have been perfect ________ the end.
A. had it not been for
B. it hadn’t been for
C. it had not been for
D. hadn’t it been for
Đáp án A
Câu điều kiện loại III đảo: S + would have PII, had + S + (not) PII
Dịch: cuốn sách này sẽ là hoàn hảo nếu như không có cái kết đó.