This is my grandfather and this is my grandmother 改为同义句 【 】my【 】.
问题描述：
This is my grandfather and this is my grandmother 改为同义句 【 】my【 】.
答
They 're my grandparents.
答
They're .....grandparents
答
This is my grandfather and this is my grandmother 改为同义句 【They're 】my【 grandparents 】.
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