A．Because they get low grades.B．Because they exhaust th-找考题网

单项选择题

A．Because they get low grades.
B．Because they exhaust the reference sources in the library.
C．Because they can spend only limited time with the professors.
D．Because their teachers do not grade every assignment of them.

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A．Return early the next day.B．Photocopy the articles he needs.C．Ask professor Grand for a copy of the articles,D．Wait until the girl has finished with her articles,

A．Return early the next day.
B．Photocopy the articles he needs.
C．Ask professor Grand for a copy of the articles,
D．Wait until the girl has finished with her articles,

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