Problem: How does the sentence end?

Mary always got good deals when she was grocery shopping but Natalie did not because 
Answer: Natalie never used coupons.

Problem: How does the sentence end?

Jimmy loves to paint models. Brett is much more supportive to Jimmy than Ryan, since 
Answer: Ryan is much more critical.

Problem: How does the sentence end?

We had abundant money in the summer but were always broke in the winter , since the 
Answer: winter was when we spent more.

Problem: How does the sentence end?

Randy has to let their hair dye process longer than Steven because 
Answer:
Steven doesn't have any gray hair.