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While income worry is _______ rather common problem of the aged, loneliness is another problem that _______ aged parents may face.
A.a; theB.the; /C.a; /D.the; the
C

试题分析:句意:对于收入的担心是老年人的一个相当普遍的问题,孤独是老年父母可能面对的另一个问题。第一个空,是泛指“一个相当普遍的问题”,故用不定冠词a;第二个空,表示一类人的可数名词复数形式前,不用冠词,选C。
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