单项选择题

It is unusual for there ______ so few students in the classroom.

A．to be
B．be
C．being
D．are
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单项选择题
During the debate my opponent kept cutting ______.
A．out
B．back
C．down
D．in
单项选择题
The profitable offices under the government were filled by men who had contracted luxurious habits of living which they would not lay ______.
A．off
B．out
C．in
D．aside
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