Problem: How does the sentence end?

When there is an emergency, you can count on Maria but not on Monica as 
Answer: Maria can cope with intense situation with ease.

Problem: How does the sentence end?

Samantha was a safe driver, unlike Natalie. 
Answer: Natalie had been pulled over for expired tags, and a DUI.

Problem: How does the sentence end?

Angela could react quickly to Elena 's moves, as 
Answer: Elena was much slower than her.

Problem: How does the sentence end?

Angela is skimming quickly over the article that Jessica just wrote because 
Answer:
Jessica is an author.