Translation:The street is long.
street, way, path, road, trail are all acceptable translations.
Without more context there is no way to choose the "best" translation. At this early point in the course, things are bound to be confusing. Realize that the language has a totally different structure from English and the Romance languages, with verbs and descriptive verbs (adjectives) coming at the end of the sentence, prepositions coming after the object of the preposition, particles (post positions) to indicate grammatical function, multiple levels of politeness, and a "nuance" particle (은/는) that can be used pretty much anywhere in a sentence to give it a whole different "flavor." How could it not be confusing?
But it's worth learning. LIke anything, it just takes practice and dedication. Don't sweat the small stuff, like a word having multiple meanings, or the course being less than perfect, or your answer not being accepted when you know it should be.
Check out some of this fellow's Youtube videos and you will get a feel for the language in a hurry. https://www.youtube.com/watch?v=XSPW6cx29bE&index=10&list=PLPCs_Vng3vqCcGT71ZvP5wiWQhDgBzsEp