Problem: How does the sentence end?

Jason always tries to improve every situation in his life unlike William because 
Answer: William has a negative mindset.

Problem: How does the sentence end?

Carrie is being paid to build a round pen for Betty's pigs, so 
Answer: Carrie is the carpenter.

Problem: How does the sentence end?

Since Joseph had a phobia of spiders and Adam loved them, 
Answer: Adam wanted to buy a pet tarantula.

Problem: How does the sentence end?

Erin's dress looks more splendid than the one of Christine because 
Answer:
Erin has a better seamstress.