Topic: Group verb,

Best Answer Explained in Below-:

The correct choice for completing the sentence "The bus came and I got---." is A) "on." This selection aligns with common English usage when referring to boarding a mode of public transportation. The phrase "got on the bus" is idiomatic and signifies the action of entering the bus, whereas "in" and "inside" are less commonly used in this context.

In English, we typically use "on" when referring to larger forms of transport, such as buses, trains, and planes. For instance, we say "I got on the train" or "She got on the plane." This usage conveys the idea of boarding or accessing these vehicles, which are considered 'larger' than individual vehicles like cars or bicycles.

Conversely, "in" is more appropriate for smaller vehicles where you physically enter, such as "I got in the car." Using "in" for a bus would sound unusual to native speakers, as it implies a sense of confinement that doesn't apply to the more open environment of a bus. Therefore, "on" is contextually and idiomatically the best choice for completing the sentence correctly.