Problem: How does the sentence end?

Maria showed Mary how to fertilize their roses because
Answer: Maria was very experienced when it came to gardening.

Problem: How does the sentence end?

I just got home from the grocery store and put the milk into the refrigerator because the
Answer: milk was warm.

Problem: How does the sentence end?

William lived a lavish lifestyle during his old age, while Derrick had to scrimp, since
Answer: Derrick had planned poorly for retirement.

Problem: How does the sentence end?

Angela was so jealous that Kayla knew how to play the guitar that
Answer:
Kayla offered to give her lessons the next day.