新概念3册的一道关于时态的题目
问题描述：
新概念3册的一道关于时态的题目
After her husband had gone to work and the children_______to school,she went upstairs.
A were sent B had been sent
新概念三册的一道题目 可我觉得应该是B
答
我也觉得应该是B...
楼上两位的答案都太牵强了 陪楼主一起等看能不能等到满意的答案