23. Ideally,the professional career diplomat should help in the ongoing maintenance ofan effective American foreign policy despite changes in administration. (A) in the ongoingmaintenance of (B) in themaintaining of (C) maintain (D) to maintainand continue（C） (E) themaintenance of 为神马D不对呢？ 原文不也强调了ongoing么？
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发表于 2011-3-17 23:00:34
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