the staffer said he did not know _____the meeting.

来源：百度知道 编辑：UC知道 时间：2024/06/13 23:58:21
a.when we started b.when will start c.when would start d.when to start

答案及原因（详细）
listen!helen is singing in the next room .
it ____be helen,she is gone to beijing.

a.can't b.mustn't c.may d.should

The staffer said he did not know _when we started_ the meeting.选A。
B显然错误；C项start应该在the meeting后面，而且也没有必要用过去将来时；D不定式表示将来的动作，不对。

It can't be helen.选A，表示“不可能”。