◎ 题干
I listened to Dr. Johnson’s lecture about biology, but I failed to get its key ____.
A.wordsB.notesC.messagesD.points
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I listened to Dr. Johnson’s lecture about biology, but I failed to get its key ____.A.wordsB.notesC.messagesD.points…”主要考查了你对  【可数名词及其单复数】【集合名词】【名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。