Problem: How does the sentence end?

The garbage truck had taken the trashbag out of Mary’s trashcan this morning, so the 
Answer: trashcan is now empty.

Problem: How does the sentence end?

Monica did not use the website to register their car but Rachel did because 
Answer: Rachel was internet savvy.

Problem: How does the sentence end?

Joel had to take vitamins while Kevin did not because 
Answer: Kevin ate a very healthy diet.

Problem: How does the sentence end?

Ryan made their bed every morning but Brian did not. 
Answer:
Ryan got compliments on their neat bedroom.