Problem: How does the sentence end?

I tried to get rid of my sofa at the dump but the 
Answer: sofa was too cumbersome to maneuver.

Problem: How does the sentence end?

I decided to paint with the roller instead of a brush because the 
Answer: roller would do the job faster.

Problem: How does the sentence end?

Buying new office supplies and storage boxes was fun for Samuel but not Joel, since 
Answer: Samuel loved to organize.

Problem: How does the sentence end?

The chemical that the scientist used was more dangerous than the other liquid, because the 
Answer:
liquid was weak.