单项选择题

Many people proposed that a national committee be formed to discuss______to existing mass transit systems.

A．substitutes
B．measures
C．duplicates
D．alternatives
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单项选择题
The victims of drunken driving in America over the past decade______an incredible 250,000, with three killed every hour of every day on average.
A．take up
B．add up to
C．count for
D．turn out to
单项选择题
He is believed to have been shot by a rival gang in______for the shootings last week.
A．revenge
B．reserve
C．reverse
D．remedial
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