Answer: 1) contaba 2) llegó
Charlie (1)contaba su dinero cuando (2)llegó el autobús.
Charlie was counting his money when the bus arrived.
Step-by-step explanation:
The action of the verb "contar" was happening when the bus arrived, so it must be conjugated in the imperfect (1)contaba, and the action of arriving interrupted the action of counting, so "llegar" must be conjugated in the preterite tense. (2)llegó. Since the subject in this sentence is "Charlie", that is a third-person in the singular, the verbs must be conjugated in this form.
