We request that all cell phones ______ for the duration of the p
分类: 英语（一）(00012)发布时间: 2024-08-12 17:40浏览量: 0
We request that all cell phones ______ for the duration of the performance. A、be turned off B、should turn off C、ought to be turned off D、to be turned off 【正确答案】：A 【题目解析】：本题考查虚拟语气及被动用法--(should)be done。