Problem: How does the sentence end?

Joseph had a new, modern house designed by Robert because 
Answer: Robert was a very talented architect.

Problem: How does the sentence end?

Leslie asked Lawrence to tutor his daughter so she could get a better grade in French because 
Answer: Lawrence spoke the language.

Problem: How does the sentence end?

Megan was more weird and quirky than Katrina in school, so 
Answer: Katrina was more popular.

Problem: How does the sentence end?

Matthew was healthier than Kenneth, so there was no concern that 
Answer:
Matthew would pass their fitness tests.