—How did you get in touch with Mrs.Green?
—Well，it seems to me that you've forgotten me her telephone number the other day.
A. to tell
B. have told
C. telling
D. being told
网友回答
A. to tell
B. have told
(答案→)C. telling
D. being told
解析：根据问话人的句意可知，“已与Mrs.Green取得联系”了。故回答部分说明“已经忘记了告诉电话号码这件事”，应该使用forget doing sth/having done sth“某事已做，但忘了”，forget to do sth意为“忘记要去做的事情”，强调动作还未发生。