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191.While income worry is ____ rather common problem of the aged,loneliness is another problem that ___ aged parents may face.
A.a;不填
B.the;不填
C.a;the
D.the;the
192.Education is a lifelong process,____ process that starts long before ____ start of school,and one that should be ____ necessary part of one's entire life.
A.a;a;a
B.a;the;a
C.the;a;the
D.the;the;the
