Problem: How does the sentence end?

Angela's house is a lot cleaner than Amy even though 
Answer: Amy happens to be a professional maid.

Problem: How does the sentence end?

Patience was something that Angela had an abundance of but not Lindsey because 
Answer: Angela was a very understanding person.

Problem: How does the sentence end?

The weights were harder for Elena to lift than Maria since 
Answer: Maria worked out a lot.

Problem: How does the sentence end?

Kenneth is a British citizen, while Joseph is an American, so 
Answer:
Kenneth is from the UK.