Question

PLEASE HELP ME CHECK MY ANSWERS FOR FRENCH!!

Answer 1

You need to correct the 'je' conjugation on a couple of them. The last one, you need the verb 'perdre' as you have to use -re verbs.
^^that is what my teacher said^^^

On vend des pâtisseries dans une boulangerie.
Oui, je répond aux questions en classe.
Les personnes attendent le train pour aller à un autre endroit.
Je rend visite à mes amis le weekend.
Elle entend la musique dans la maison
Je gagne mon match de tennis.

Answer 2

What were the original sentences?

Supposing your answers are the expected ones, remember the first and second person of -re verbs end with an "s" .

Hence: "je réponds", not "je répond"