王老师:19139051760(拨打)复制微信 题目 更新时间:2023/4/3 During the Second World War, once before, the U-boats had been _____ because of air attack.A、in troubleB、in the troubleC、for troubleD、within trouble 答案 登录 注册 A 出自:安徽教育在线 >> 滁州学院-学前教育 滁州学院继续教育学院