* "Nosostros" means "we" and indicates the subject is plural.
* "a clase de español" means "to Spanish class".
* "todos los días" means "every day".
This sentence needs a verb that describes a regular action happening in the present. Of the options given:
* vamos means "we go" and is the present tense of the verb "ir" (to go).
* ibamos means "we were going" and is the imperfect tense.
* fuimos means "we went" and is the preterite tense.
* iban means "they were going" and is the imperfect tense.
Therefore, the complete sentence is "Nosotros vamos a clase de español todos los días", meaning "We go to Spanish class every day".