Problem: How does the next paragraph end?

How to buy a wood burning stove 
Consider your heating needs by evaluating the size of your home. 
You will need to determine the heat load necessary to maintain the square footage of the area you want heated. Heat load is measured in btus, or british thermal units.
A: You will need 25 to 30 btus per square foot. Measure each room to be heated with measuring tape.

Problem: How does the next paragraph end?

How to travel with contact lenses 
Bring enough solution for your whole trip. 
Even within the same country, your brand of contact solution might not be available everywhere. To ensure that you do not run out, bring enough solution for the entire trip.
A: It is better to pack too much than too little. Just remember that if you need to take more than 3 oz.

Problem: How does the next paragraph end?

A couple dances on a ballroom floor with people seated at tables nearby. People nearby take photos of the couple. the couple
A: finishes and leaves the dance floor.

Problem: How does the next paragraph end?

How to make tooth powder 
Measure out four tablespoons calcium (carbonate) powder. 
You can crush calcium carbonate tablets or buy calcium powder in bulk. Adding calcium to your toothpaste helps to rebuild the calcium in your teeth.
A:
Put four tablespoons of baking soda into your bowl. Add two tablespoons baking soda.