Problem: How does the sentence end?

The statue fit in the middle of the shelf, but the bookend did not, because the 
Answer: statue was thin.

Problem: How does the sentence end?

Angela loved to grow potatoes and carrots, but Katrina preferred to buy them. 
Answer: Angela was a good gardener.

Problem: How does the sentence end?

Chris was working fine with the computer but was maladaptive to the tablet because the 
Answer: tablet was difficult to use.

Problem: How does the sentence end?

William was able to stay up later than Kevin was because 
Answer:
William had drank their coffee.