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 ending.

A. had it not been forB. hadn’t it been forC. it hadn’t been forD. it had not been for

Đáp án đúng là: 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.