问题
单项选择题
Speaker A. Can you come to my office early to help me with my paperSpeaker B: ______
A．Thank you for your invitation. I'm sure to be there.
B．I'd like to, but I can't leave until I've typed out the letters.
C．By all means. I have to finish my own paper first.
D．What do you expect me to do for you
答案
参考答案：B
解析：A方问B方能否提供帮助，需要B方给予肯定或否定的答复。A项前半部分把对方的请求误解成邀请了，C项前后矛盾。D项的问题显得不礼貌。