过去进行时的构成与用法 — 英语填空题
题目
用所给动词的适当形式填空。When the rainstorm came yesterday evening, my father ___ (fix) the broken window and my mother ___ (prepare) dinner in the kitchen. At that moment, I ___ (do) my homework in my room. Just then the lights went out suddenly, so we all stopped what we ___ (do) and lit a candle.