It is divertido which means funny.
Here is what I got as the answer:
Servir —> sirvió
It would be "llegaron". A really helpful tool is to look at some online tables that share regular conjugations for the preterite tense. Hope this helps!
Answer:
Deber
Explanation:
For example: su deber es lavar los platos.
(your duty is to wash the dishes)