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Passage One Questions 11 to 13 are based on the passage you have just heard.

A．All students.
B．All staff.
C．Graduate students only.
D．Both students and staff.

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The movement of animals and plants can also be from _________ to _________ besides that from Asia to America.

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Why is the author against the Bering Strait land bridge view

Passage One Questions 11 to 13 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。