单选题 What can we do for them ______ all the help they have given us?
【正确答案】 B
【答案解析】[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 honour of“为庆祝(纪念)……”;in reply to“为答复……”。可见,只有B符合题意。