What’s the matter with Tim?— Oh. Tim’s cell-phone was left in a taxi accidentally, never again.[ ]

eone has toanaction or policy, they are responsible for it, and may be required toexplain it to other people or be punished if it fails．

____he will go to work in a mountainvillage surprises all of us

I shall never forget the days ______ I stayed in Africa, ________ has brought me a lot of advantages.

They arrived _____Shanghai a cold morning .