Problem: How does the sentence end?

Laura had to learn from Megan about how to handle knitting wool, as 
Answer: Laura struggled with handling the material.

Problem: How does the sentence end?

The books that I bought at the auction didn't fit on the shelves, because the 
Answer: shelves were too short.

Problem: How does the sentence end?

Once the mind is made up, Neil will not change it but Kyle might as 
Answer: Kyle is very flexible.

Problem: How does the sentence end?

Nelson did not have to practice football very hard, but Eric did as 
Answer:
Eric was naturally very bad at it.