Problem: How does the sentence end?

Nelson was required to keep a food journal that Derrick was not because 
Answer: Nelson had to go on a diet.

Problem: How does the sentence end?

New flooring was installed in Kayla's new home by Emily because 
Answer: Kayla is a customer.

Problem: How does the sentence end?

They were going to eat cucumber instead of having to eat the apple since the 
Answer: cucumber was more convenient.

Problem: How does the sentence end?

While they were knitting sweaters, Logan did poorly while Ryan was skillful, so the sweater of 
Answer:
Ryan turned out beautifully.