单项选择题


Passage Three
Questions 33 to 35 are based on the passage you have just heard.

A．They attack human beings.
B．We need to study native animals.
C．They can’t live out of the rain forest.
D．We do not know much about them yet.
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单项选择题
A．It changes the body’s metabolism through rapid weight gain.B．It tricks the body into responding as if it were in a different time zone.C．It promotes increased alertness by adding snacks to the diet.D．It builds resistance to illness by increasing intake of vitamins.
A．It changes the body’s metabolism through rapid weight gain.
B．It tricks the body into responding as if it were in a different time zone.
C．It promotes increased alertness by adding snacks to the diet.
D．It builds resistance to illness by increasing intake of vitamins.
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