I don't like driving long distances - I prefer to go __ air.

I don't like driving long distances - I prefer to go __ air.

• A. by
• B. on
• C. in
• D. with

Answer: (A)

Choosing the correct preposition shows how we express the method of travel. When talking about how you travel, English uses by + the mode: by car, by train, by boat, by air. In this sentence, the idea is travel by air, i.e., go by airplane. That makes the phrase natural and clear. On air is used for broadcasting, as in being heard live; in air isn’t a standard way to describe travel and sounds incorrect here; with air would imply some accompaniment or tool, not the method of travel. So the best fit is by air.

Choosing the correct preposition shows how we express the method of travel. When talking about how you travel, English uses by + the mode: by car, by train, by boat, by air. In this sentence, the idea is travel by air, i.e., go by airplane. That makes the phrase natural and clear.

On air is used for broadcasting, as in being heard live; in air isn’t a standard way to describe travel and sounds incorrect here; with air would imply some accompaniment or tool, not the method of travel. So the best fit is by air.