单项选择题

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

A．In 1966
B．In 1967
C．In 1938
D．In 1939
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单项选择题
A．An allergy to animals.B．A reaction to toxic chemicals.C．An allergy to food.D．Contact with a noxious plant.
A．An allergy to animals.
B．A reaction to toxic chemicals.
C．An allergy to food.
D．Contact with a noxious plant.
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