作业帮 > 英语 > 作业

she____fifty or so when i first met her at the conference

来源:学生作业帮 编辑:灵鹊做题网作业帮 分类:英语作业 时间:2024/05/05 22:54:06
she____fifty or so when i first met her at the conference
A,must be
B,had been
C,could be
D,must have been
但我觉得C项也没错啊,其他几项为什么错呢
我希望解释的能更详细些 A,B,C项不选是时态有问题吗
she____fifty or so when i first met her at the conference
一定是D表示肯定
A因为是过去必须是must have been
B表示过去的过去,肯定不对
C因为是过去必须是could have been
只有D符合要求