I believe the correct answer would be Japan.
Answer:
1) Fueron (Plural of "Ir" (go) in past tense. Ellos = they.)
2) Fue. (Ella fue, third person, past)
3) Fueron (same as question one; modifying this time "Ustedes")
4) Fuiste (second person, past tense of "Ir": You went)
5) Fuimos (Fourth person (we) and in the past).
