Problem: How does the sentence end?

Jessica 's dance routine had more polish than Erin 's because 
Answer: Erin practiced so little.

Problem: How does the sentence end?

Christine enjoyed racing games while Amy only played puzzle games, so 
Answer: Christine was always driving on their computer.

Problem: How does the sentence end?

We refused to deliver pizza to the dorm, but were ok bringing it to the office, as the 
Answer: office was consistent in paying us.

Problem: How does the sentence end?

Betty was able to hold the pigeon longer than Angela because 
Answer:
Angela is scared of birds.