商场请了一位专业清洁工来清除地面上顽固的口香糖残留。

The mall hired a professional ___gum remover to remove stubborn chewing gum residues from the floor.

我买了一个小工具来清理桌子上的口香糖残渣。

I bought a small ___scraper to clean the chewing gum residue off the table.