单项选择题

Australia began to assume its modern configuration by the Eocene Epoch, some 50 million years ago, when Antarctica broke away and drifted southward.

A．status
B．sphere
C．shape
D．situation
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单项选择题
Although diverse, African music has certain distinctive traits, one of which is the use of repetition as an organizing principle.
A．benefits
B．features
C．notions
D．options
单项选择题
Admiral Cerebra knew he was being ordered to certain destruction but felt compelled to obey. He chose the morning of July 3 for a gallant escape attempt.
A．daring
B．futile
C．critical
D．fruitful
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