单项选择题

In the preface ____________ my book, I thanked all the people who had been of help to me.

A．of
B．to
C．in
D．for
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单项选择题
I must find someone to act as a (an) ____________ for me during my absence.
A．agent
B．delegate
C．representative
D．deputy
单项选择题
The open college is based on a new ____________ on education which emphasized the use of modern audiovisual media to get message across.
A．perspective
B．possession
C．prediction
D．proportion
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