Appropriate Preposition for Arrival Location

This question tests the correct usage of prepositions, specifically in the context of arrival at a location. Prepositions are words that link nouns, pronouns, and phrases to other words in a sentence, often indicating direction, time, place, or introducing an object.

The sentence is: "They arrived __________ the airport on time." We need to find the preposition that best fits the blank to indicate reaching the location of the airport.

Analyzing the Options:

• Option 1: $over$ - The preposition $over$ usually implies movement above something, covering something, or a state of completion. It is not typically used to indicate arrival at a specific location like an airport. For example, "The plane flew over the city." This doesn't fit the context of arriving at the airport.
• Option 2: $at$ - The preposition $at$ is commonly used to denote a specific point or location. When talking about arrival, $at$ is the standard choice for specific places such as a station, bus stop, home, or airport. "Arrived at the airport" is the correct idiomatic expression for reaching the airport premises.
• Option 3: $in$ - The preposition $in$ is generally used for larger areas, like cities, countries, or enclosed spaces (e.g., arriving in London, arriving in the building). While you might be in the airport building, the act of reaching the airport as a destination is typically expressed using $at$. For instance, "We arrived in Paris after a long flight" vs. "We arrived at the airport just in time."
• Option 4: $on$ - The preposition $on$ is typically used for surfaces (e.g., on the table), specific days, or dates (e.g., on Monday, on July 4th). It does not fit the context of arriving at a location like an airport.

Conclusion:

Based on standard English grammar rules for prepositions of place and arrival, $at$ is the most appropriate choice to indicate the destination when someone arrives at a specific location like the airport.

Therefore, the completed sentence is: "They arrived at the airport on time."