Problem: How does the sentence end?

Justin had a sun burn on their skin but not Lawrence because 
OPTIONS:
- Justin shielded them self to the sun.
- Lawrence shielded them self to the sun.
Answer: Lawrence shielded them self to the sun.

Problem: How does the sentence end?

Christopher loved cake, but William didn't, so 
OPTIONS:
- Christopher took the extra piece of cake for himself.
- William took the extra piece of cake for himself.
Answer: Christopher took the extra piece of cake for himself.

Problem: How does the sentence end?

Jess chose to use wallpaper and not paint for the walls because the 
OPTIONS:
- wallpaper was prettier.
- paint was prettier.
Answer: wallpaper was prettier.

Problem: How does the sentence end?

they had to stop at the highway and not in the tunnel because the 
OPTIONS:
- tunnel was dark.
- highway was dark.
Answer:
tunnel was dark.