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．A seafood restaurant.B．A very fancy restaurant.C．An exclusive restaurant.D．An Italian restaurant.

A．A seafood restaurant.
B．A very fancy restaurant.
C．An exclusive restaurant.
D．An Italian restaurant.

单项选择题Today scientists know something about the causes of earthquakes.

A．Y
B．N
C．NG

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