2.Accidents will happen. 天有不測風雲。
3.A clean hand wants no washing. 身正不怕影子斜。
4.A clear conscience laughs at false accusations. 白日不做虧心事，夜半敲門心不驚。
5.A close mouth catches no flies. 病從口入，禍從口出。
6.A cock is valiant on his own dunghill.夜郎自大。
7.A common danger causes common action.同仇敵愾。
8.A contented mind is perpetual feast. 知足常樂。
9.Actions speak louder than words. 事實勝於雄辯生