Problem: How does the next paragraph end?

How to maintain a healthy heart
Stop all forms of tobacco use.
Using tobacco increases your risk of heart damage. Both tobacco and nicotine contain many chemicals that cause harm to your blood vessels and heart, and this results in atherosclerosis, which is a plaque build-up of cholesterol, fat, and calcium in your vessels that can cause your arteries to narrow, decreasing blood flow.
A: The carbon monoxide in cigarette smoke has also been linked to mortality and morbidity. It interferes with oxygen, so your heart is pressured into supplying additional oxygen to compensate.

Problem: How does the next paragraph end?

A man and woman face off inside a gym. they
A: are both wearing boxing gloves.

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How to buy microfiber towels
Understand the 2 main types of microfiber towels.
Thicker, rugged towels are better for cleaning and dusting. Thin, smooth towels are better for polishing surfaces.
A: Decide for what purpose you need a microfiber towel. Microfiber towels are specially designed for a number of uses, including car polishing, electronics dusting and cleaning homes.

Problem: How does the next paragraph end?

How to prepare to buy a house
Take a hard look at your budget.
Start by looking at what you pay in rent now. That's a good starting place to figure out what you can pay on a mortgage.
A:
However, you also must consider what you can get approved for. Generally, you'll only get approval for a monthly mortgage payment that's 30% to 35% of your pretax income.