问题 更新时间2023/4/3 12:59:00 Since 1780, when the town’s first hat factory ______ in Danbury, Connecticut, the town has been a center for hat manufacturing in the United States.(本题3.5分) A、 were established B、 was establishing C、 had been established D、 was established 答案 登录 注册 标准答案:D 出自:青书学堂 >> 大连工业大学-大学英语3