He has no idea _________ she left without a word

Twenty-five people died in the traffic accident in Guizhou Province. It’s _______ one that I have ever heard of.

A number of questions ________ by parents at the meeting, but the school leaders could not ________ any proper answer.

caused the accident is still a complete mystery.

Hurry up. There is only ten minutes left.–You _____ about it. The station is notfar from here.