Answer:
The answer is the last one eschuchamos
Explanation:
Translating the sentence, we get something along the lines of Raul ____ the pen to write. There's one word we can see falls into the blank, and that's used. Now all wee need to do is translate used into Spanish. One way to say used in Spanish is usado, so usado is the word that best completes the sentence.
Tell me in English what you learn from the video and ill put it in a Spanish version that wont look like (google translate)
The name of the knife that was carried by gauchos is called an Facon.