题目内容
根据要求完成句子变化
I have given this book to the library.
（变为被动语态）This book ________ ________ __________ to the library.
答案：has;been;given
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题目内容
根据要求完成句子变化
I have given this book to the library.
（变为被动语态）This book ________ ________ __________ to the library.