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1：is that his pen?改复数 2：she is my good friend.改为一1：is that his pen?改复数2：she is my good friend.改为一般疑问句3：that is Cheng Long改一般疑问句4：it's dave.改一般疑问句
题目详情
1：is that his pen?改复数 2：she is my good friend.改为一
1：is that his pen?改复数
2：she is my good friend.改为一般疑问句
3：that is Cheng Long改一般疑问句
4：it's dave.改一般疑问句
1：is that his pen?改复数
2：she is my good friend.改为一般疑问句
3：that is Cheng Long改一般疑问句
4：it's dave.改一般疑问句
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are these his pens
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