尔雅 智慧树 mooc

单选题：Whyshouldwepracticeourspeechbeforewegiveit?ABecausepracticeisrequired.BBecausepracticeisperfect.CBecausepracticeiseasy.DBecausepracticewillhelpyoufeelconfident.

  尔雅 智慧树 mooc


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