関連ワード:  is it correct to write dear sirs    is it correct to write dear sirs madams    is it correct to say dear sirs    is it ok to write dear sirs in email    is it correct to use dear sirs in a letter    is it ok to write dear sirs    is it correct to write dear mr    is it ok to say dear sirs    is it ok to write dear sir madam    is it correct to say dear sir madam