单项选择题

New mineral resources may be discovered during the present Antarctic _________.

A．excursion
B．expedition
C．voyage
D．journey
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Whenever he thinks about his mistakes that cannot be _________ he will be very uneasy.
A．identified
B．justified
C．rectified
D．modified
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She enjoys the party so much because of rich ________ foods.
A．extravagant
B．excessive
C．exotic
D．exhaustive
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