Complete the sentence: These days, in millions of homes around the world, people make cups of tea _________ tea bags.

• A. From
• B. Using
• C. With
• D. By

Answer: (C)

The main idea is showing the means or instrument used to do something. When you want to say what you use to make tea, English often uses with to indicate the tool or method. Tea bags are the instrument here, so the natural phrasing is “make cups of tea with tea bags.” It keeps the sentence concise and matches everyday usage.

Using could work, as in “using tea bags,” but with tends to sound more natural in this kind of general statement about how people commonly prepare tea. From suggests a starting point or origin, which isn’t the right sense for the tool used. By isn’t used to indicate the instrument in this context.