If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.
The poor man , ________,ran out of the dark cave.
His report was so exciting that it wasinterrupted by applause(掌声).
_______ in a friendly way, their quarrel came to an end.
Themankeptsilentintheroomunless_______.
Inthetrafficaccident,hisfathercamecloseto________.