Lucy and Lily ------ sister.They study in the same school.(2

学习时间:2026-04-03 09:29:11 阅读：8100

Lucy and Lily ______ sister.They study in the same school.(2009北京市)答案是are,为什么这里sister不加s?

纯情的小松鼠

2026-04-03 09:29:11

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因为原句中,Lucy and Lily are sister,应该被理解为她们的姐妹关系相对于对方而言的。我这样说可能你就明白了：Lucy is Lily's sister; lily is lucy's sister,所以就不用加“S”了。