Problem: How does the sentence end?

Carrie is more career focused than Elena because 
Answer: Elena has a trust fund to fall back on.

Problem: How does the sentence end?

All the routine tasks at work bores Donald but Ryan is fine with it, 
Answer: Donald prefers variety in work.

Problem: How does the sentence end?

The cart went slower than the scooter did because the 
Answer: scooter had a much bigger motor.

Problem: How does the sentence end?

The floor was easier to take care of than the wall.  The 
Answer:
floor  is so clean.