单项选择题

Tympanostomy tubes are meant to ______.

A．dissolve slowly.
B．replace medicines.
C．alleviate eardrum pressure.
D．reduce earaches.
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单项选择题
The Harvard study has concluded that ______.
A．children never benefit from ear surgery.
B．tympanostomy tubes result in deafness.
C．some surgeons are too eager to operate.
D．ear tube operations are too expensive.
单项选择题
In addition to the economic considerations, there is a ________ motive behind Bush's signing of the new farm bill.
A．partisan
B．social
C．financial
D．cultural
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