题目内容

20．This is         bedroom．It's big and clean．（　　）
A．Lucy and Lily'sB．Lucy and Lily
C．Lucy's and LilyD．Lucy's and Lily's

分析 这是露西和莉莉的卧室．它很大并且很干净．

解答 答案：A．考查名词所有格．句意"这是露西和莉莉的卧室．它很大并且很干净．"Lucy and Lily's 表示两人共同所有的一个东西，则只能在后面那个名词后面加上's，且后接单数名词；Lily's and Lucy's表示两人各自所有的两个东西，则应在两个名词后面都加上's，且后接复数名词．根据题干This is ____bedroom．It's big and clean．可知bedroom为单数，应为共同所有．故选A．

点评 掌握名词所有格的用法，根据句意来具体分析判断．

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根据材料内容选择最佳答案，并将其标号填入题前括号内．
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