单项选择题

Scientists are working hard to come up with a sure solution to the food______ for mankind.

A．decline
B．rarity
C．scarcity
D．shortage
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单项选择题
When we credit the successful people with intelligence, physical strength or good luck we are making excuses for ourselves because we fall ______ in all three.(2002年中国人民大学考博试题)
A．rare
B．lacking
C．short
D．scarce
单项选择题
It was a real ______ when Susan came back from her vacation and told us she had married a local waiter.(2003年上海交通大学考博试题)
A．comfort
B．shock
C．attack
D．impact
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