单项选择题

The agreement is considered ( ) satisfactory.

A．being
B．to be
C．/
D．be
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单项选择题
The seller ( ) accept our claims as tendered.
A．can but not
B．but cannot
C．cannot but
D．not but
单项选择题
There has been a positive response to the export promotion, ______ ( )
A．hasn't it
B．hasn't there
C．doesn't it
D．has there
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