Problem: How does the sentence end?

Erin could make some mean dishes while Samantha was mediocre at it, so 
Answer: Erin was more skilled at cooking.

Problem: How does the sentence end?

George wanted to store the high quality jpeg photo on his hard-drive, but the 
Answer: photo was too large.

Problem: How does the sentence end?

The manager asked Rachel rather than Natalie to grab the photo off of the wall because 
Answer: Natalie is short.

Problem: How does the sentence end?

Ian began to test Ryan on various elements in the periodic table, because 
Answer:
Ian was good at science.