問題詳情

5. ______ indicate that Social Security benefits constitute the main source of income for retired Americans who are over sixty-five years of age.
(A) Official
(B) Stocks
(C) Surveys
(D) Geometers

參考答案

答案:C
難度:簡單0.738876
統計:A(121),B(17),C(631),D(39),E(0) #
個人:尚未作答書單:vocabulary、persume

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