单项选择题

Are you aware of the danger （）

A．your being
B．you are in
C．your being out
D．you are through

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单项选择题
The professor has finished （） the students' papers.

A．to correct
B．in correcting
C．correcting
D．being corrected
单项选择题
All the creatures depend on the sun's rays for the light and warmth which （） us alive.

A．keeps
B．keep
C．kept
D．is keeping
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