问题
选择题
Unitl 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
答案
答案：A
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Unitl 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
答案：A