Problem: How does the sentence end?

The math problems were easier to work on the computer than the calculator because the 
Answer: computer was designed for math.

Problem: How does the sentence end?

Meeting men was never a problem for Katrina but it was for Mary because 
Answer: Katrina was very attractive.

Problem: How does the sentence end?

He preferred using vinegar rather than oil in the solution, because the 
Answer: vinegar made it appealing.

Problem: How does the sentence end?

Betty wants to prepare the ground for sod so she asks Tanya for an advice, because 
Answer:
Tanya knows a lot about it.