单项选择题

The author seems to think that commercial interruptions on television and radio.

A．are a waste of time
B．are fully justified.
C．only serve the interest of producers.
D．only serve the interest of the media.
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单项选择题
We learn from the passage that passage that a storm follows a change in ______.
A．humidity
B．temperature
C．air pressure
D．moisture
单项选择题
What does the author mean when he interprets the urge for a sharper focus
A．The US will be justified in cutting its financial contribution.
B．More heated arguments will be unavoidable between richer and poorer countries.
C．There should be better service for poorer countries but no cost - cutting.
D．The poorer countries will not receive more benefits.
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