单项选择题

A．They migrate from North America to the Falkland Islands.
B．They migrate only once during their lifetime.
C．They migrate using what is apparently an inborn navigational ability.
D．They migrate when they are freed from their cages.
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单项选择题
A．Those who watch the show five times a week learn more than the occasional viewers.B．Those who watch the show occasionally learn more than the five-time viewers.C．Those who watch the show at different hours learn more than regular viewers.D．Those who watch the show regularly learn more than the viewers watch it at different hours.
A．Those who watch the show five times a week learn more than the occasional viewers.
B．Those who watch the show occasionally learn more than the five-time viewers.
C．Those who watch the show at different hours learn more than regular viewers.
D．Those who watch the show regularly learn more than the viewers watch it at different hours.
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