In this task if the pronoun is female or gender-neutral you are to replace it with a male pronoun. If there are no pronouns add a male-gendered word to the sentence.

David is in an indie band.
im in a indie band

not at all sir. she is very famous and popular
No sir, who is she? Is she famous?

Hey man, have you hear of da vinci code, i know a little about it, can you tell me more, brother?

Have you hear of Da vinci code, i know a little about it, can you tell me more?