题目内容
Until tens of years ago,most zoos _____ in such a way—animals in one area and birds in another.
A.were organized B.had organized C.will organize D.have been organized
A
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题目内容
Until tens of years ago,most zoos _____ in such a way—animals in one area and birds in another.
A.were organized B.had organized C.will organize D.have been organized
A