单项选择题

Jenny didn't have time to go to concert last night because she was busy () for her examination.

A. preparing
B. to be prepared
C. to prepare
D. being prepared

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单项选择题
We will agree to do what you require () him.

A. of
B. from
C. to
D. for
单项选择题
Every human being, no matter what he is doing, ()body heat.

A. keeps up
B. puts off
C. takes in
D. gives off
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