灵鹊做题网I think Ann must____on duty today A.be B.is C.are D.am
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I think Ann must____on duty today A.be B.is C.are D.am
为什么?
为什么?
A. be
must 后面用动词原形
希望能帮到你,祝更上一层楼O(∩_∩)O
有不会的欢迎再继续问我(*^__^*)
再问： What’that? It's_________ A.a pencil of Mary B.a Mary's pen C.a pencil of Mary's D.Mary's a pen
再答： 选C，双重所胡格，意思是它是玛丽的一只钢笔。表示某人的其中一个，用双重所有格。
must 后面用动词原形
希望能帮到你,祝更上一层楼O(∩_∩)O
有不会的欢迎再继续问我(*^__^*)
再问： What’that? It's_________ A.a pencil of Mary B.a Mary's pen C.a pencil of Mary's D.Mary's a pen
再答： 选C，双重所胡格，意思是它是玛丽的一只钢笔。表示某人的其中一个，用双重所有格。
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