This book _________Lucy's book.Her name is on the book cover.

问题描述:

This book _________Lucy's book.Her name is on the book cover.

must

is

如果是两个空就用: must be 一定是


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不明白的再问哟,请及时采纳,多谢!

这里肯定是must be ,后面说她的名字就在书上写着呢,所以是肯定的回答

This book ______is___Lucy's book. Her name is on the book cover.
有帮助请及时采纳 O(∩_∩)O谢谢!