Death of the team leader and a member of team 5 , the last two genins were added to different teams. A boy added to the team 7. Typically team 7 now have 4 genins with one leader.

Kakashi: "so we have a new member for our team. Hope you three get along"

Naruto: "A NEW MEMBER YAYYYY!!!" He is just a sunshine

Sakura: "I hope it's not a girl and if is then not beautiful" she doesn't want her crush, Sasuke to get away from her

Sasuke: "just pathetic" he have his and annoyed cold look