单项选择题

No one could come up with an easy solution to the government' s predicament—labor ______. which is caused by the wars.

A．decline
B．vacancy
C．rarity
D．shortage
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单项选择题
Nowadays, our government advocates credit to whatever we do or whoever we contact with. Once you ______ your words, you will lose your social status and personal reputation.
A．keep up with
B．give away from
C．go back on
D．lose sight of
单项选择题
in 1955 Martin Luthor King, Jr., gained national ______ for his nonviolent methods used in a bus boycott in Montgomery.
A．realization
B．permission
C．recognition
D．revolution
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