Problem: How does the sentence end?

While changing her eating routine, Sally stopped eating chips and replaced it with fruit. The 
Answer: fruit were smooth.

Problem: How does the sentence end?

Staying flexible was easier for Amy than Emily because 
Answer: Amy did all sorts of stretching exercises.

Problem: How does the sentence end?

The presentation that Nelson gave was bad, and Lawrence's was the best in class. 
Answer: Nelson forgot to practice.

Problem: How does the sentence end?

Rebecca could calculate very complex numbers and fractions but Felicia could not because 
Answer:
Rebecca had always been good at math.