Viết lại các câu sau sử dụng câu điều kiện
1, If you were to change your mind, I would be most grateful
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2, If she decides to come, please telephone
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3, If he had understood the problem, he wouldn't committed those mistakes
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4, If I had known about those problems, I would never have moved here
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5, If he had not resign, we would have been obliged to give him the sack
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