单项选择题

This kind of songbird sleeps much less during its annual ______, but that doesn’t seem to affect its flying.

A．emigration
B．migration
C．conveyance
D．transference
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单项选择题
When the Italian poet Dante was ______ from his home in Florence, he decided to walk from Italy to Paris to search for the real meaning of life.
A．exiled
B．expired
C．exempted
D．exerted
单项选择题
From science to Shakespeare. excellent television and video programs are available ______ to teachers.
A．in abundance
B．in operation
C．in store
D．in stock
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