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单项选择题

In total darkness, doves ______.

A．circle helplessly
B．use landmarks
C．find their way by clouds
D．fly back home

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热门试题

单项选择题Under man-made stars, the bird in the cage ______.

A．tried to fly in the opposite direction of birds not caged
B．changed direction when the position of the stars was changed
C．wouldn't fly well
D．stayed where they were

单项选择题The experiment with the dove indicated that ______.

A．birds can fly in the same direction as that taken by their cousins
B．a bird that has been caged will not fly long distances
C．some birds seem to follow the stars when they fly at night
D．a bird having spent its lifetime in a cage has to be taught how to navigate