单项选择题

A．It takes time to collect the useful information.
B．One can only read books in the library.
C．All books are difficult to understand.
D．One has to line up to borrow books.
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单项选择题
A．She has to post the memo 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 memo right now.
A．She has to post the memo 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 memo right now.
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