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RE: Vocab-ability–163 (oper = work) – A More Powerful Vocabulary (earn UpVotes with “Vocab Practice” exercise)
MY VOCAB PRACTICE:
1.- You must operate the sewing machine.
2.- We need everyone's cooperation.
3.- This train is inoperable.
4.- In the news they said what is the modus operandi of the evildoers.
Good work!