the carpet is really dirty. it needs to be( ). 是以s开头的单词,包含9个字母.

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the carpet is really dirty. it needs to be( ).
是以s开头的单词,包含9个字母.

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sweeping清扫
need to be doing嘛

sanitated

the carpet is really dirty. it needs to be groomed.
不是 substituted (那是代替), 可以用 replaced (替换)