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
It is strictly ___________that access to confidential documents is denied to all but a few.
A．secured
B．forbidden
C．regulated
D．determined
单项选择题
The manager gave one of the salesgirls an accusing look for her ___________attitude toward customers.
A．impartial
B．mild
C．hostile
D．opposing
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