To form the imperfect continuous you use imperfect tense of the verb + the present participle of the verb that tells what you were doing. A. ser B. estar C. hacer D. decir

B. estar

To form the imperfect continuous you use imperfect tense of the verb estar + the present participle of the verb that tells what you were doing.

Example: Los niños estaban jugando fuera y los vecinos estaban hablando en voz baja.

Translation: The children were playing outside and the neighbours were speaking quietly.

b.

explanation:

just because.

well, the b sentence is the only one that has sense.