Espero que Esta respuesta te ayude
This is up to you and what your paper says, but the translation is:
We do a project in the English class.
Answer:
preterito is used for past actions that are completed and imperfecto is used for past actions that didn't have a start or end
examples
imperfect
repetitive action
something u used to do
time or age
talking about the future
preterito
how long it occurred
took place at a certain time
start of a event
completed actions