Felicia, a trained ornithologist, was quite interesting to amateur birder Christine. 
OPTIONS:
- Felicia had a more profound understanding of the bird world.
- Christine had a more profound understanding of the bird world.
Felicia had a more profound understanding of the bird world.

I would like to learn to ride a bicycle rather than a unicycle. To learn to ride the 
OPTIONS:
- unicycle is hard.
- bicycle is hard.
unicycle is hard.

The singer tried to record the song on the phone but the 
OPTIONS:
- song was too long.
- phone was too long.
song was too long.