—How many people are still leading life under poverty line in the world?
—Perhaps one fourth.
A. a, the
B. a, a
C. 不填，不填
D. the, 不填
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(答案→)A. a, the
B. a, a
C. 不填，不填
D. the, 不填
解析：life:[u , c] way of living .如have an easy /hard life. 过闲适/艰苦的生活.第二个空特指贫困线，应用 the .故选A.