单项选择题

A．He didn’’t get the book he needed.
B．He had no idea where the book was.
C．The library is closed on weekends.
D．He was not allowed to check out the book.
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单项选择题
A．She has to post a letter instead.B．She has to turn down the man’’s request.C．She’’s not sure if the computer is fixed.D．She can’’t send the message right now.
A．She has to post a letter instead.
B．She has to turn down the man’’s request.
C．She’’s not sure if the computer is fixed.
D．She can’’t send the message right now.
单项选择题
Eighteen states have enacted laws to regulate activities in wetlands.
A．Y
B．N
C．NG
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