Problem: How does the sentence end?

The customer ask the waitress to exchange the mug for the cup on the counter because the 
Answer: mug looked dusty.

Problem: How does the sentence end?

The wedding was held in the banquet hall instead of the ballroom although the 
Answer: ballroom was better decorated.

Problem: How does the sentence end?

The graphic novel that Robert wrote sold fewer copies than Michael, so 
Answer: Michael is the more advanced writer.

Problem: How does the sentence end?

The taxes on the car were more than the taxes on the bike because the 
Answer:
bike was more cheap.