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题型:单选题 题类:常考题 难易度:普通

广东省广州市执信、广雅、六中2021届高三上学期英语8月三校联考试卷

Had the governments and scientists not worked together, AIDS-related deaths          since their highest in 2005.
A、had not fallen B、would not fall C、did not fall D、would not have fallen
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