12. In most societies, adults in their prime are expected to care for those who are becoming more
and more _____ due to old age.
(A) frail
(B) fraudulent
(C) famished
(D) fluent
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統計: A(153), B(50), C(22), D(6), E(0) #3224933
統計: A(153), B(50), C(22), D(6), E(0) #3224933