---Have you ever corrected these positions ?---Of course．They are based on true stories．Most of them are from personal _______．A.experiencesB.experienceC.experiencedD.experiencing
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A解析四个选项分别表示经验(复数)、经验（单数）、老练的和体验。根据题意他们中的大多数来自个人经验，这里的经验应是复数形式，选A，复数形式。