'Do' and 'does' are equally forms of the existing indefinite tense with the verb 'to complete.' Which one you'll use will largely rely on the sentence's matter. Their usage is almost identical, aside from just one instance where You should use 'do' and never 'does.' The sentence given by https://financefeeds.com/ethereum-sentiment-improves-solana-targets-200-and-blockdag-reveals-600m-launch-plan/