to respond is the same as to answer (= 回答). to promise= to assure someone that you will do something (= 诺).

They mean completely different things. promise - to make a statement that you will or will not do something respond - to answer a written or verbal question, to reply Promise - "I promise to call you tomorrow." "The company promises this year's car will work better than that product." "I promise to leave you alone." "I promise to respond to your email." Respond - "Please respond to my question." "Please respond to this wedding invitation by January 1." "How do you respond to that accusation?" "My response to your promise is that I think it is worthless!"

It's high time you get yourself a lexicon because i can't see why for this question.the gaps, differences in meaning between these two are clear.come on!

http://www.thefreedictionary.com/promise http://www.thefreedictionary.com/respond Check them out. The two words are totally different.