Necesito ir a la tintorería [blank] lavar mi traje translates to "I need to go to the dry cleaner's [blank] wash my suit". The options are listed as follows.
· como - "how"
· si - "yes"
· para - "for" or "to"
· que - "what"
Evidently, the option that makes the most sense is para meaning "to".
Necesito ir a la tintorería para lavar mi traje