My sister _____ (not read)this book before 填什么

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My sister _____ (not read)this book before 填什么
My sister _____ (not read)this book before 填什么

My sister _____ (not read)this book before 填什么
hasn't read
before前面用完成时,之前没有过,强调结果“过”、“了”用完成时

didn't read