Choose the correct form of the verb 'to be'

Hi! I [am|is|are] Kyle and this [am|is|are] my sister, Serena. We [am|is|are] from America. I [am|is|are] 17 years old. My favourite hobby [am|is|are] reading and I [am|is|are] very good at painting. Basketball [am|is|are] my favourite sport and I [am|is|are] in the school basketball team. It [am|is|are] my dream to play for my favourite basketball team, the Boston Celtics. Serena [am|is|are] 15 and her favourite hobby [am|is|are] playing music. She [am|is|are] very good and it [am|is|are] her dream to become a famous singer, like Shakira or Beyonce. Serena and I [am|is|are] very good at sport.