Problem: How does the sentence end?

Christine but not Rachel had nightmares because 
Answer: Christine remembered the creature they saw at the zoo.

Problem: How does the sentence end?

Fred wanted to revamp his annual charity events theme to a new design. The 
Answer: theme was old.

Problem: How does the sentence end?

We could treat the cancer at the hospital, but we opted for the clinic, as getting to and from the 
Answer: hospital was inconvenient.

Problem: How does the sentence end?

Monica needed to borrow a screwdriver from Lindsey because 
Answer:
Monica did not have a good tool box.