This is the correct form to complete the conversation using the simple present tense:
Gloria, ¿tú conoces al maestro de historia y geografía?
No, yo no lo conozco.
The conversation given is conjugated in the present tense.
The Spanish simple present tense (''presente del indicativo'' in Spanish) is used to talk about habitual situations, routines, universal truths and facts.
Check more information about the simple present tense here https://brainly.com/question/25856028
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