51. The Olympic Games helped to keep peace among the pugnacious states of the Greek world in that a sacred truce was proclaimed during the festival's month. (A) world in that a sacred truce was proclaimed during the festival's month (B) world, proclaiming a sacred truce during the festival's month (C) world when they proclaimed a sacred truce for the festival month (D) world, for a sacred truce was proclaimed during the month of the festival (E) world by proclamation of a sacred truce that was for the month of the festival 正确答案是D。 但是不明白B的解释: it is not clear who would be doing the proclaiming; a clause is preferable to a phrase here.
不是说分词可以modify a clause 的马? 不需要主语的马?谢谢
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