The post-World War Ⅱ baby ______ resulted in a 43 percent increase in the number of teenagers in the 1960s and 1970s.

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问题 The post-World War Ⅱ baby ______ resulted in a 43 percent increase in the number of teenagers in the 1960s and 1970s.

选项 A、bomb
B、boom
C、production
D、prosperity

答案B

解析 bomb意为“炸弹,原子弹”;boom意为“激增,繁荣”,指人口等的突然增长;production意为“生产,产品”;prosperity意为“繁荣,景气”,指繁盛的状况。baby修饰所填之词,根据后面的a 43 percent increase in the number of teenagers可知,应选boom。
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