Respuesta :

The answer is me.
Ayer me presto  dinero.
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Answer: Mariana: es muy generosa. Ayer me prestó dinero

Explanation: We must complete the sentence:

"Mariana: es muy generosa. Ayer __________ prestó dinero (a mí)."

This can be translated to:

"Mariana: She is very generous. Yesterday she lent ___ money"

This can be completed with "me" that indicates to who she lent the money, in Spanish "me" also completes the sentence.

Mariana: es muy generosa. Ayer me prestó dinero