问题描述：
1.That is my grandfather.(改为一般疑问句并作否定句回答)2.Are those pens?(改为单数句）
3.Is she your sister?（作肯定句回答）4.It's a photo of her family.(改为同义句）
3.Is she your sister?（作肯定句回答）4.It's a photo of her family.(改为同义句）
问题解答：
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