Problem: How does the sentence end?

Jeremy bought chicken fillet instead of beef steak, because he was shopping on a budget and the 
Answer: beef was more expensive.

Problem: How does the sentence end?

The cat ate more food than the dog did because the 
Answer: cat was much hungrier.

Problem: How does the sentence end?

After their parents fell ill, Natalie gave them care while Victoria did not. 
Answer: Natalie was very careful.

Problem: How does the sentence end?

Natalie but not Felicia passed the class because 
Answer:
Felicia got an F on their term paper.