Como puedo usar la palabra agua en una oracion de contexto

When could you attach the direct object pronoun to an infinitive verb? a: when an infinitive verb follows a conjugated verb. b: when an infinitive verb ends in a question. c: when a stem-changing verb ends in a question. d: when a stem-changing verb follows a conjugated verb.

Which form of the verb ir correctly completes this sentence?

How do you say the number 28 in spanish