When did they（ start） the factory?同义句

When did they（ start） the factory?同义句 When did it start? when did it start? 解释 When did you start out? when did you start to______? Did the couple start any hobbies when they retired?改写句子,保持句意不变,Did the couple —— —— any hobbies when they retired, 是when did it started还是when did it start? when did you start to learn english? When did it start?About ______ ago. 怎样回答When did you start school? when did you start （）(hiccup) When did Lu Xun start to write When did they _______the new game?A had B start C ask D do选什么呢 为什么捏 When did it start?为什么did用过去式? they are discussing when they will start work.(同义句) when did you start learning English?改为同义句 When did you start learning English怎么回答 when did you start class today是什么时态