Question

Lucy answered the door after | _________ (ring) the bell twice.
A) had rung
B) rang
C) ring
D) to ring​

Answer 1

Resposta:

Letter a) had rung - Lucy answered the door after had rung  the bell twice.

I hope this helps!!

Answer 2

Resposta:

A) had rung

Explicação:

Lucy answered the door after | __had rung__ (ring) the bell twice.

Lucy "atendeu" a porta depois que eu tinha tocado a campainha 2 vezes.

Aqui temos 2 ações passadas, uma ocorrendo antes e outra depois. Então a que ocorreu primeiro tem que ir no Past Perfect. HAD + Participio

Portanto letra A