Problem: How does the next paragraph end?

How to adopt a guinea pig
Make sure no one at home is allergic.
In addition to guinea pig allergies, many people develop allergies to the hay that guinea pigs use in their cages. Before adopting a guinea pig, you and your housemates way want to talk to your doctor or an allergist to ensure that no one in your home will have an allergic reaction.
A: One of the most common reasons people give up guinea pigs is an allergy, either to the animal itself or its hay/bedding. Rule out allergies before adopting a guinea pig.

Problem: How does the next paragraph end?

How to start a weed whacker
Place the weed whacker on the ground, away from obstructions.
This will give you more leverage as you try to start the weed whacker. Additionally, you want to make sure any object that could get caught in the spinning line is kept well away.
A: Make sure the gas tank is sealed before starting your weed whacker. Always use the right kind of gas mixture because most weed whackers are two cycle.

Problem: How does the next paragraph end?

How to knit the moss or seed stitch
Cast on the number of stitches that you will need to complete your project.
If you are just practicing, cast on 10 stitches.
Do your first row by alternating between knitting one stitch and purling the next.
A: Continue alternating between knitting and purling stitches until you reach the end of the row. Remember to place your yarn either in front or behind the stitch you are making so that the yarn is in the correct position to either knit or purl.

Problem: How does the next paragraph end?

The car is dried and vacuumed, then on to the next car. The customer is handed his keys and he is on his way with a clean car. two men
A:
are messing around while cleaning the car.