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．

The stranger shook me by the hand warmly ___ he were to say he knew me well

What do you usually do at the weekend —I the TV program “Who’s Still Standing (一站到底)” with my family.

Thanks for your kind help! We would have_________ lost the game!

failure can’t beavoided, and participating is victory