单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．The professor postponed the exam and will inform everyone later.
B．The professor phoned him about the postponing of the exam.
C．The professor canceled the exam.
D．The professor put off the exam.
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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
How did cable providers solve the problem of the earliest cable systems
A．They strategically placed antennas with very long cables connecting to subscribers’ television sets.
B．They made the signal from the antenna travel through the length of cable.
C．They inserted amplifiers at regular intervals.
D．They increased the length of cable.
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