Problem: How does the sentence end?

Kayla was able to keep flowers alive longer than Amy because 
Answer: Kayla had a green thumb.

Problem: How does the sentence end?

Craig fell in one of the holes that Joseph dug and didn't warn them about and 
Answer: Craig got hurt.

Problem: How does the sentence end?

The PDF file could not be saved on the disc space because the disc has something else on it already and the 
Answer: space is low.

Problem: How does the sentence end?

Robert sought medical assistance from Randy since 
Answer:
Robert had a broken joint in his arm.