Choose the correct forms

1. Annabel is
   [the youngest|the eldest]
   sister of mine. She is 22, Lisa is 20, and I'm 18.
2. What was the
   [most interesting|more interesting]
   film you have ever watched?
3. My dad is
   [the craziest|the saddest]
   person I know. He is often off skateboarding or surfing.
4. This house is
   [the more modern|the most modern]
   building in the city.
5. That day was
   [the worst|the best]
   day in my life. I was very happy.