what time do Mary and her sister ( A.do their homework B.do their homeworks

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what time do Mary and her sister ( A.do their homework B.do their homeworks

what time do Mary and her sister ( A.do their homework B.do their homeworks
what time do Mary and her sister ( A.do their homework B.do their homeworks

what time do Mary and her sister ( A.do their homework B.do their homeworks
homework是不可数名词,不能加s,故选A

A
homework是不可数名词
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A
homework是不可数名词,不能+s
求采纳

答案:A.do their homework
因为:homework为不可数名词,无复数形式

选 A
因为 homework 是不可数名词,不能加 s