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来源：网络来源 作者：中考网编辑 2021-03-25 09:54:28
中考网整理了关于2021年中考英语之被动语态练习题（九），希望对同学们有所帮助，仅供参考。
Many books on science _____ since I went to college.
A. were bought
B. have been bought
C. will be bought
D. are bought
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