Totheirgreatsurprise,theyfound

来源：语文精选馆 2.09W

To their great surprise, they found ________ in the meeting.

A．they were not understanding B．themselves not understood

C．they had not understood D．themselves not understanding

B 考查语态。这里oneself和后面的动词是被动关系，所以应该用过去分词。find oneself done发现自己被……，故选B。