Question

We make affirmative sentences in the past continuous with

(A) did+verb+ ing

(B) does+verb

(C) verb to be (past)+verb+ing

(D) be (past) not+verb+ing

Answer 1

Para se fazer uma sentença no passado continuo, usa-se o auxiliar verbo to be no passado + verbo principal no ing. **Letra C.**
Exemplo:
"We were going to the market" - Nós estávamos indo ao mercado