单选题
The post-World War Ⅱ baby ______ resulted in a 43 percent increase in the number of teenagers in the 1960s and 1970s.
【正确答案】
B
【答案解析】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。