'Do' and 'does' are equally forms with the current indefinite tense in the verb 'to complete.' Which 1 you will use will generally rely upon the sentence's topic. Their usage is almost similar, except for one instance where you can use 'do' rather than 'does.' Cloning: Cloning requires taking https://financefeeds.com/bruce-markets-secures-investment-from-fidelity-nasdaq-ventures-copyright-webull-and-others/