When finding an interjection, think about comics. An interjection is exclamation that is used to express a feeling. When finding an interjection, think about comics and all the expressions they use like 'bam', 'pow', etc. Like I said, one of the cheats to finding an interjection is to think about comic books.
Answer: C) Wow
I believe it is B, it makes the most sense "Although Marvin loves to fish, he seldom gets the chance." Hope this helps!
One place would be next to the word and the other would be at the beginning, where they explain the symbols.
If you want to explain to a foreigner how to learn when to use these words, you can say that the go from more general to more specific (in: more general, at: more specific).
in: for objects inside other objects, or for location in a big context: year, country,
on: on top of other objects, or for location in middle-scale contexts: day, street
at: for location on a very small scale: moment (exact time), at specific address<span />