单项选择题

Which of the following is NOT true

A．Zoos play an important role in educating people about the conservation of wildlife and plants.
B．Zoos are a good device against species extinction.
C．Zoos valuable role in society is still an issue in debate.
D．Zoos are regularly visited by most city people.
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单项选择题
The author says it is unfair to put the blame on all zoos because______.
A．zoos are different in many respects
B．many zoos serve to educate the visitors
C．some zoos act as a safety device for rare animals
D．zoos are being improved all the time
单项选择题
What important respect was ignored in collecting animals in the past
A．Zoos provided inadequate entertainment for people.
B．Zoos were not aware of a responsibility to prove their collections right in regard to its importance for science, conservation and popular education.
C．Zoos paid so much attention to the benefit their collections brought that they ignored the needs of animals.
D．Zoos didn't bring their commercial potentialities into full play.
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