单项选择题

I ______ with thanks the help of my colleagues in the preparation of this new column.

A. express
B. confess
C. verify
D. acknowledge
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单项选择题
A drunk man walked in, ______ both in appearance and odor.
A. repulsive
B. reluctant
C. reproachful
D. reputed
单项选择题
It is useful to be able to predict the extent ______ which a price change will affect supply and demon.
A. from
B. with
C. to
D. for
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