单项选择题

Only under special circumstances freshmen are permitted to take make-up test.

A．under
B．circumstances
C．freshmen are
D．to take
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单项选择题
It's already 5 o'clock now. Don't you think it's about time we are going home
A．It's
B．o'clock
C．Don't you
D．are going
单项选择题
People appreciate to have worked with him because he has a good sense of humor.
A．to have worked
B．because
C．a good sense
D．humor
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