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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单项选择题
A．She needed the notes last week.B．The man can return her notes after the exam.C．She’ll have enough time to prepare for the exam.D．The man won’t need to study the notes for the exam.
A．She needed the notes last week.
B．The man can return her notes after the exam.
C．She’ll have enough time to prepare for the exam.
D．The man won’t need to study the notes for the exam.
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