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.