Let's break down why:
* "How to arrive at the station" implies a process or a set of directions. It's asking for the steps needed to reach the station. For example:
* "Can you tell me how to arrive at the train station?"
* "The directions on how to arrive at the station are confusing."
* "Get on" is an action verb that means to board a vehicle, such as a train, bus, or plane. It's not about the journey to the station, but rather the act of starting the journey. For example:
* "I got on the train at 8:00 AM."
* "Make sure to get on the right bus."
In an exam writing context, these phrases are likely to be used in different types of questions:
* "How to arrive at the station" might be used in a question about giving directions or describing a route.
* "Get on" might be used in a question about a travel narrative, describing the journey itself.
Therefore, "how to arrive at the station" and "get on" are not interchangeable in exam writing. They have distinct meanings and would be used in different contexts.