If you had asked him, he______helped you to solve the problem.
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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions If you had asked him, he______helped you to solve the problem.
will have
ought to have
should have
would have
Giải thích
Đáp án là D. Câu điều kiện loại III: If + S+ had + PII, S+ would+ have + PII.