Problem: How does the sentence end?

They would have trouble becoming catholic from their start of being protestant, since the 
Answer: protestant religion is relaxed.

Problem: How does the sentence end?

Joseph sustained an injury while working out but Craig didn't because 
Answer: Joseph didn't warm up properly.

Problem: How does the sentence end?

As it began to rain, Aaron ran to Christopher because 
Answer: Christopher was carrying an umbrella.

Problem: How does the sentence end?

Samantha gave Mary vocal lessons for the upcoming school concert because 
Answer:
Samantha had well-trained vocals.