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.

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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

单项选择题The message the writer attempts to convey throughout the passage is that

A．poor countries should be given equal opportunities in trade.
B．the "least-developed country" status benefits agricultural countries.
C．poor countries should remove their suspicions about trade liberalization.
D．farmers in poor countries should also receive the benefit of subsidies.