题目内容
Recently, there is ____ boom（繁荣）in population mobility and according to ____ national population survey of 2004, 17 percent of the population move every year.
| A．the; a | B．a; the | C．/; a | D．the;/ |
B
解析试题分析：考查冠词。第一空a boom泛指在人口流动方面的一次繁荣，故用不定冠词a；第二空the national population survey of 2004是特指的2004年的国家人口调查，故用定冠词the。句意：最近根据2004年国家人口调查，人口流动方面有一次繁荣，每年有17%的人口流动。故B正确。
考点：考查冠词
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