单项选择题

Absorbed in her work, she was totally ______ her surroundings.

A．liable for
B．separated by
C．oblivious of
D．concerned about
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单项选择题
The little girl is just learning to walk and she's always ______ over.
A．tumbling
B．wagging
C．waving
D．swaying
单项选择题
In 1844, Charles Stun. a British soldier and colonial administrator, made an expedition ______ a supposed inland sea; his party penetrated more than 1000 miles northward, almost to the center of Australia.
A．in quest of
B．with regard to
C．in favor of
D．by way of
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