单项选择题

This university offers a wide variety of high-quality ______ courses for both graduate and undergraduate students.

A．select
B．choice
C．alternative
D．optional
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单项选择题
As he walked out the court, he was ______ with frustration and rage.
A．applauding
B．quivering
C．paralyzing
D．limping
单项选择题
There are still some ______ for students of science and engineering, but those in arts and humanities have been filled.
A．positions
B．vacancies
C．applications
D．categories
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