Problem: How does the sentence end?

The man tried calming down, but the siren and smoke were stressful, the
Answer: smoke being the physical problem.

Problem: How does the sentence end?

Megan decided to sing a song at the talent show that Mary was judging.
Answer: Mary was happy to decide who won first place.

Problem: How does the sentence end?

Joseph frequently had mood swings that affected the relationship with Brian, but
Answer: Joseph refused to seek treatment.

Problem: How does the sentence end?

Mary recommended a brand new smart phone for Tanya because
Answer:
Mary was familiar with modern tech.