a part of sth that is left after the other parts have been used, removed, destroyed这语法结构?

a part of sth that is left after the other parts have been used, removed, destroyed这语法结构?

题目
a part of sth that is left after the other parts have been used, removed, destroyed这语法结构?
答案
a part of sth 主语
that is left after the other parts that引导的定语从句 修饰主语
have been used,removed,destroyed 谓语 被动语态
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