单项选择题

The researcher mentioned in the third paragraph was fired because ______.

A．she worked for the rival of the company
B．she failed to keep her research results secret
C．she was obliged to keep her discoveries secret
D．she was committed to a contract with a company
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单项选择题
It can be inferred from the passage that doctors are able to determine hospital policies because ______.
A．it is doctors who generate income for the hospital
B．a doctor is ultimately responsible for a patient's health
C．most of the patient's bills are paid by his health insurance
D．some patients might refuse to accept their physician's advice
单项选择题
The author's primary purpose in writing this passage is to ______.
A．inform potential patients of their heath-care rights
B．criticize for exercising too much control over patients
C．urge hospitals to reclaim their decision-making authority
D．analyze some important economic factors in health-care
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