The correct answer is
option 3 : passed through.
Here, the meaning of the sentence is that the train entered from one end and exited from another. So, 'through' is the most accurate preposition for this purpose. The explanation of the given prepositions is given below :
- into - to a position in or inside something, in the direction of something, to a point at which you hit somebody/something.
- across - We use across as a preposition (prep) and an adverb (adv). Across means on the other side of something, or from one side to the other of something which has sides or limits such as a city, road or river.
- over - We use over as a preposition and an adverb to refer to something at a higher position than something else, sometimes involving movement from one side to another.
- through - When we talk about moving from one side to another but ‘in something’, such as long grass or a forest, we use through instead of across.
When moving from one side to another while surrounded by something, we use through not across.
When we talk about something extending or moving from one side to another, we use the word across and not on.
We don’t use through when we’re talking about periods of time from start to finish and we mention a specific number of days, weeks, etc.
Correct sentence: The train passed through the long dark tunnel.