Final answer:
The correct verb to complete the sentence is 'conozco'
Step-by-step explanation:
The correct verb to complete the sentence is conozco.
In this sentence, the subject 'Yo' is followed by the verb 'conozco', which means 'I know' in English.
For example, if you want to say 'I know his phone number' in Spanish, you would say 'Yo conozco su número de teléfono'.
Learn more about Using the correct verb in Spanish sentences