A. Birds use their beaks to clean their feathers. B. Pr-找考题网

单项选择题

A. Birds use their beaks to clean their feathers.
B. Preening is very important to birds.
C. The habits of birds are interesting.
D. How birds clean their feathers.

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单项选择题

A. He created kite-flying.B. He established a government service.C. He developed a new road.D. He established the postal system.

A. He created kite-flying.
B. He established a government service.
C. He developed a new road.
D. He established the postal system.

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motivations

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