Problem: How does the sentence end?

Betty's dog had a lot of aggression but not Rachel's dog because 
Answer: Betty had a dog that bit a lot of people.

Problem: How does the sentence end?

Cleaning a piano is easy to Nick but not Leslie because 
Answer: Leslie makes it complex by not using a feather duster.

Problem: How does the sentence end?

We could not greet them at the airport, so we waited in the lot.  The 
Answer: lot made it easy to find them.

Problem: How does the sentence end?

The skin did not have the glow as it had so much dirt, it needed cleansing as the 
Answer:
dirt was too much.