Preposition Choice for Car

The question asks us to choose the correct preposition to complete the sentence: "How many people can you fit ______ your car?". We need to consider which preposition is typically used to describe being inside a vehicle like a car.

Let's look at the given options:

• on: The preposition 'on' is usually used for surfaces (like sitting on a chair) or for larger public transport vehicles where you can stand and walk around (like on a bus or train). You are not typically 'on' a car, unless perhaps referring to the roof or hood, which is not the context here.
• in: The preposition 'in' is used for being inside an enclosed space or container. A car is an enclosed space where people sit inside. When you are inside a car, you are 'in' the car.
• at: The preposition 'at' is used for specific points or locations (like at the park, at the corner). It's not used to describe being inside a vehicle in this context.
• of: The preposition 'of' is used to show possession, origin, or relationship (like the colour of the car). It does not fit the meaning of being inside the car.

The phrase "fit ______ your car" refers to fitting people inside the car. The correct preposition to indicate being inside an enclosed space like a car is 'in'.

Therefore, the completed sentence is: "How many people can you fit in your car?"

Comparing this with the options, the correct preposition is 'in'.