单项选择题

How long can a graduate student keep the borrowed books（）

A. 14 days.
B. 20 days.
C. 28 days.

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We were in（）when we left that we forgot the airline tickets

A. a rush so anxious
B. a such anxious rush
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D. such an anxious rush
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The number of the stamps（）limited, so a number of people（）to have a look at them.

A. are ; want
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C. is ; want
D. are ; wants
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