Answer:
bebimos
Step-by-step explanation:
The preterit tense, also known as the past tense, of the verb beber is bebimos when used with the pronoun nosotros (us).
Bebemos is in the present tense, therefore it is not what we are looking for.
Bebi is also in the past tense for the pronoun Yo (I) but it is misspelled. The correct would be actually "bebí".