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A．Professor and student.
B．Classmates.
C．Customer and shop assistant.
D．Colleagues.
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单项选择题According to the passage, the worst case that revealed the fatal side effects of the pills is ______.

A．82 patients on fen-phen have suffered heart trouble
B．a woman patient on fen-phen died of hypertension
C．the diet pills cause brain damage
D．7 patients who had taken Redux developed heart defects

单项选择题The statement the diet-drug revolution is facing a setback is supported by the following facts EXCEPT that ______.

A．some health organizations and diet chains have suspended their support for the pills
B．some states have forbidden or limited the prescriptions of the pills
C．patients in Florida are advised to drop the use of fen-phen
D．Sheldon Levine, a New Jersey doctor, recommended one of the pills on TV and in his book