单项选择题
Questions 33 to 35 are based on the passage you have just heard.
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A．By its thick layer of fat under its skin.
B．By moving frequently in the water.
C．By adjusting its blood temperature.
D．By taking in hot air.
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单项选择题
A．Graduation.B．A class reunion.C．The dedication of a new building.D．The groundbreaking ceremony for a pedestrian walkway on campus.
A．Graduation.
B．A class reunion.
C．The dedication of a new building.
D．The groundbreaking ceremony for a pedestrian walkway on campus.
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单项选择题
A．They were responding to an oral interview.B．They were making outlines of their essays.C．They were answering several history questions.D．They were evaluating each other’s answer.
A．They were responding to an oral interview.
B．They were making outlines of their essays.
C．They were answering several history questions.
D．They were evaluating each other’s answer.
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