Final answer:
The best translation of the sentence is 'Conocemos a tantas personas como ellos.'
Step-by-step explanation:
The best translation of the sentence 'We know as many people as they do.' is 'Conocemos a tantas personas como ellos.' Conocemos means 'we know' and a tantas personas como ellos means 'as many people as they do.'
Learn more about Translation of a sentence from English to Spanish