单项选择题

The fee for getting information from BDU should be paid______.

A．annually
B．monthly
C．quarterly
D．every six months
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单项选择题
This ad will be very helpful to______.
A．foreign business people.
B．foreign travelers
C．Chinese people
D．China Daily reporters
单项选择题
It can be seen from the passage that the expansion of America's elderly population______.
A．will provide good job opportunities in many areas
B．will impose an unbearable burden on society
C．may lead to nursing home abuse and age discrimination
D．will create new fields of study in universities
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