Problem: How does the sentence end?

She cut the cereal box down into an organizer tray because the 
Answer: box was worthless.

Problem: How does the sentence end?

The tree gave better overall shade at the picnic than the canopy, because the 
Answer: canopy was thinner.

Problem: How does the sentence end?

He switched to taking notes in pen instead of on the laptop because the professor talked quickly and the 
Answer: laptop was slow.

Problem: How does the sentence end?

Kayla was able to keep flowers alive longer than Amy because 
Answer:
Kayla had a green thumb.