Cuando juan estaba al actor, otro reportero le hizo una pregunta. a. entrevistó b. entrevistaste c. entrevistando d. entrevistaba

For this case we have the following statement:

When Juan was to the actor, another reporter asked him a question.

We must fill in the blank with the correct verb

The correct verb conjugated in continuous past is:

Juan was interviewing

We have then:

When Juan was interviewing the actor, another reporter asked him a question.

The translation of the sentence in English is:

Cuando Juan estaba entrevistando al actor, otro reportero le hizo una pregunta.

C. entrevistando

c is the correct answer for this question.