Birds have to be taught to navigate．,A bird that has be-找考题网

单项选择题

A．Birds have to be taught to navigate.
B．A bird that has been caged will not.
C．Some birds cannot fly at night.
D．Some birds seem instinctively to follow the stars when flying at night.

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单项选择题

A．The man is learning how to use a computer.B．The woman is showing the man how to put page numbers on a document.C．The man is printing a document.D．The man is using his computer to do mathematical functions,

A．The man is learning how to use a computer.
B．The woman is showing the man how to put page numbers on a document.
C．The man is printing a document.
D．The man is using his computer to do mathematical functions,

单项选择题

A．The longest street in the world.B．A TV program.C．A country.D．The United States.

A．The longest street in the world.
B．A TV program.
C．A country.
D．The United States.

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