Problem: What happens next in this paragraph?

How to be a taxi driver
Check to be sure you qualify.
All cities have a set of requirements to drive a taxi, and you should check them to be sure you qualify. Typical requirements for drivers include :
A driver's license minimum age-in most cities taxi drivers must be at least 21, though in some they can be as young as 18.
A: Good health-drivers often have to pass a health exam to assure they have no conditions that would endanger passengers. No convictions-drivers must typically have no felony convictions and not be serving parole.

Problem: What happens next in this paragraph?

Boys arm wrestle in a match for a large crowd. The crowd congratulates the winner. the two boys
A: shake hands after the match.

Problem: What happens next in this paragraph?

Both the mother and son use a lemon juicer to squeeze the juice and add it to the jug of water. the mother
A: makes sure that all the juice is properly squeezed out of the lemons, so she uses her hands.

Problem: What happens next in this paragraph?

How to double dip travel rewards
Enroll in a frequent flyer program that makes sense for you.
The most common type of travel rewards are airline miles. In order to earn the most miles, including in double-dip scenarios, you'll need to join a a frequent flyer program that you will be most able to use.
A:
For many people, this is simply the program affiliated with whatever airline they fly with most often. One factor is proximity to an airline's hub.