优质解答
关于诚信：
Promise is debt 一诺千金.
One’’s sin will find one out.坏事终归要败露.
Honesty is the best policy.诚实为上策.
Distrust can be contagious.But,so can trust.不信任有传染性.但是信任也如此.
Cheaters never win and winners never cheat.作弊者从不成功.成功者从不作弊.
Better deny at once than promise long.轻诺必寡信.
An honest man’s word is as good as his bond 君子一言,驷马难追.
A man of his word 言而有信的人.
关于礼貌：
"After you" is good manners.
“您先请”是礼貌.
Courtesy costs nothing
礼多人不怪
There is nothing that costs less than civility
彬彬有礼,惠而不费
关于诚信：
Promise is debt 一诺千金.
One’’s sin will find one out.坏事终归要败露.
Honesty is the best policy.诚实为上策.
Distrust can be contagious.But,so can trust.不信任有传染性.但是信任也如此.
Cheaters never win and winners never cheat.作弊者从不成功.成功者从不作弊.
Better deny at once than promise long.轻诺必寡信.
An honest man’s word is as good as his bond 君子一言,驷马难追.
A man of his word 言而有信的人.
关于礼貌：
"After you" is good manners.
“您先请”是礼貌.
Courtesy costs nothing
礼多人不怪
There is nothing that costs less than civility
彬彬有礼,惠而不费