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A．Not work well.
B．Increase the population number.
C．Delay the increase of population
D．It will not exist in the year 2030.
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单项选择题
Martin Luther King, Jr. , a young black clergyman, became a national leader of the _______ Movement in the 1950s.
A．Civil Rights
B．Boycott
C．Segregation
D．Integration
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