单项选择题

New mineral resources may be discovered during the forthcoming Antarctic_________.

A．expedition
B．excursion
C．execution
D．exposition
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单项选择题
He called this an insult to the professional _________ of teachers and declared that the obligation of the U.S. labor movement is to improve the status of teachers.
A．humidity
B．commodity
C．integrity
D．liability
单项选择题
Whenever I go out, I always keep a certain amount of money _________, in case of an emergency.
A．by hand
B．in hand
C．on hand
D．at hand
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