Problem: How does the sentence end?

Lindsey liked to use herbicide on their garden but Felicia avoided using it. 
Answer: Lindsey didn't spend much time weeding their garden.

Problem: How does the sentence end?

The tampons worked great when Tina got her period, but she hates the pads. The 
Answer: pads are more untrustworthy.

Problem: How does the sentence end?

Nelson helped Robert improve a boxed cake because 
Answer: Robert had entered a contest and wanted to win.

Problem: How does the sentence end?

Monica had to help Sarah make a sign on Minecraft because 
Answer:
Monica had a lot of experience making them before.