根据汉语意思在下面的谚语中填入所缺的单词

根据汉语意思在下面的谚语中填入所缺的单词
1,Once bitter ,twice( ).一朝被蛇咬,十年怕井绳
2,Two heads are better than( ).三个臭皮匠,顶个诸葛亮
3,Rome was not built in a ( )冰冻三尺非一日之寒
4,A ( ) broom sweeps 新官上任三把火
5,( ) twice before you act.三思而后行
6,That ( ) is the richest whose pleasure are the cherpest.能处处寻求快乐的人才是最富有的人
7,If( ) comes,can spring be far behind?冬天来了,春天还会远吗