—Hi Betty are you free at present? I have to ask you for a favor—．With pleasureA. Sorry

问题补充：

—Hi, Betty, are you free at present? I have to ask you for a favor．

—．With pleasure

A. Sorry, I am busy

B. Go ahead

C. Help yourself

D. Ask, please

答案：

A. Sorry, I am busy

(答案→)B. Go ahead

C. Help yourself

D. Ask, please

解析：考查请求帮助的交际用语。A 对不起，我很忙；B 说吧（表同意）；C请自便；D 请问。根据语境“ask you for a favor”可知是请求对方帮助，再根据回答“With pleasure（非常乐意）”可知表同意，故选B。句意：——嗨，贝蒂，你现在有空吗？我要请你帮忙。——说吧。乐意帮忙。