Problem: How does the sentence end?

Kayla has a muscular body while Jessica does not, mostly due to the fact that 
Answer: Jessica spends no time pumping iron.

Problem: How does the sentence end?

Rachel is considered a leading expert witness over Victoria because 
Answer: Rachel has 25 years of experience in the field.

Problem: How does the sentence end?

Angela wanted Betty to go to the yard sale but 
Answer: Betty  had other obligations to do.

Problem: How does the sentence end?

Justin called on Leslie's  brand new phone, but there was no answer. 
Answer:
Leslie was outside.