Problem: How does the sentence end?

Dennis showed a major symptom of depression after Brian died, since
OPTIONS:
- Dennis was in mourning.
- Brian was in mourning.
Answer: Dennis was in mourning.

Problem: How does the sentence end?

Leslie hated rodents but his friend Brett had a pet rat, so
OPTIONS:
- Leslie screamed when the rat was in the bed.
- Brett screamed when the rat was in the bed.
Answer: Leslie screamed when the rat was in the bed.

Problem: How does the sentence end?

Robert smokes and Leslie doesn't smoke so
OPTIONS:
- Robert bought a cigar at the cigar shop yesterday.
- Leslie bought a cigar at the cigar shop yesterday.
Answer: Robert bought a cigar at the cigar shop yesterday.

Problem: How does the sentence end?

The mother allowed Elena, but not Emily to have a fish because
OPTIONS:
- Elena was attentive to pets.
- Emily was attentive to pets.
Answer:
Elena was attentive to pets.