单项选择题
It usually imposes strict time limitations（）the speaker.
A.in
B.on
C.about
D.with
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单项选择题
You（）to feedback from your listener.
A.adapt
B.adopt
C.apply
D.analyze -
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You tailor your message（）your audience.
A.about
B.for
C.to
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The training is（）for every type of communication.
A.worthless
B.invaluable
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