单项选择题

The dog's ears ______ when it ran.

A．flopped
B．flipped
C．fluttered
D．flapped
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单项选择题
In a moment the little bird, set free after being encaged for weeks, would rise swiftly ______.
A．out of view
B．out 6f seeing
C．out of hand
D．out of sight
单项选择题
He was ordered away upon a long ______ to the ice-covered south, to make war upon the natives there and rob them of their furs.
A．excursion
B．expedition
C．tour
D．voyage
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