单选题 What can we do for them ______ all the help they have given us?
A. in regard to B. in return for C. in honour of D. in reply to

【正确答案】 B

【答案解析】in return for“作为…的报答(报酬)”；in regard to“关于，至于”，与with regard to，in respect to(of)，with respect to同义；in honor of“为庆祝(纪念)……”；in reply to“为答复……”。可见，只有B符合题意。