A、Because books could be lent to everyone. B、Because books could be lent at no costs. C、Because books were lent to students and

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问题  

选项 A、Because books could be lent to everyone.
B、Because books could be lent at no costs.
C、Because books were lent to students and faculty.
D、Because books were lent on a paid membership basis.

答案D

解析
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