Answer:
Él da el libro a María. (He gives the book to María).
Explanation:
As strange as it might seem, nothing has to be changed, the answer is already there. All we do is write it all down in one sentence.
In Spanish, the same that in English you always give something TO somebody, you'll always give something A alguién. That means that we could change "maría" for a masculine word, a plural word, second person, first person, etc. It will always be "a".
Hope it helped,
BiologiaMagister