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．

________ excited us was that more than 100 miners trapped in the Wangjialin flooded coal mine were saved alive

The 20th century________ many new means of communication，like radios, televisions, telephones and the Internet.

None of us ______ pollution.

When the teacher came in , the students _______ about the film.