Tom’s away at the moment. He’s . . . . . . . . holiday in France. A. on B. at C. in D. for

The correct answer is on.

The preposition “on” is used to indicate that someone is on a journey or trip. In this case, Tom is on holiday in France.

The other options are not correct because:

• “At” is used to indicate a specific location. In this case, Tom is not at a specific location in France, he is simply in France.
• “In” is used to indicate a period of time. In this case, Tom is not on holiday for a specific period of time, he is simply on holiday.
• “For” is used to indicate a purpose or goal. In this case, Tom is not on holiday for a specific purpose, he is simply on holiday.