—Mrs. Wang was sent to teach English in a poor mountain village last year.—She said she would never forget some pleasant while working there.A.experimentsB.expressionsC.experiencesD.emotions
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C解析C考查名词的词义。experience作“经历”讲，是可数名词；作“经验”讲，是不可数名词。“她永远不会忘记一些愉快的经历”，故选C。