Problem: How does the sentence end?

The conversation was interesting for Kevin but bored Joel , since 
Answer: Kevin was familiar with the subject.

Problem: How does the sentence end?

Ian was mostly a better cook than William, but 
Answer: Ian made the worse dish today.

Problem: How does the sentence end?

It is obvious Christopher has a bigger ego than Brian because 
Answer: Christopher is always bragging about awards.

Problem: How does the sentence end?

My father tried to drive the trailer into the garage but he couldn't, because the 
Answer:
garage was too short.