Problem: How does the sentence end?

Dennis helped Derrick replace his broken lawn mower blade because 
Answer: Derrick was inexperienced at mechanics.

Problem: How does the sentence end?

Rebecca was notified by the company the Monica had no ambition in while working on the project but 
Answer: Monica would not sit down to talk about it.

Problem: How does the sentence end?

The man chose to rent the house instead of the trailer because the 
Answer: trailer was more cluttered.

Problem: How does the sentence end?

Robert was very stubborn but Matthew always was willing to compromise, so 
Answer:
Robert refused to accept advice.