Problem: How does the sentence end?

Robert threw his PS3 controller at Lawrence because 
Answer: Robert had lost to him in the game.

Problem: How does the sentence end?

The terms of the work contract suited Joel but not Nelson because 
Answer: Joel was committed to working for the company.

Problem: How does the sentence end?

She received flowers from her boyfriend on their anniversary but didn't get chocolates because the 
Answer: chocolates were sold out.

Problem: How does the sentence end?

Erin offered to help Natalie build her new house, although 
Answer:
Natalie possessed talent at construction.