Rule reminder
Full review: intransitive si (singular), transitive si (agrees with object), adjectives = masculine plural, reflexive verbs = ci si, past tense = si e + participle (masculine singular for intransitive; agrees with object for transitive; masculine plural for ci si).
Completa: 'In quella localita turistica, l'estate scorsa ___ molti turisti stranieri.' (Last summer in that tourist spot, many foreign tourists were welcomed.)