单项选择题

Even before the treaties were ______, the "permanent Indian frontier" was moved farther west,

A．invalidated
B．proved
C．ratified
D．refuted
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单项选择题
The newly elected leader has declared his intention of cleaning ______ the civil administrative organs.
A．down
B．off
C．up
D．out
单项选择题
The director has______ me with the unpleasant job of dismissing perfectly good workers that the firm can no longer afford to employ.
A．forced
B．pressed
C．lumbered
D．engaged
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