单选题 —When did these symptoms begin, Mrs. Smith? —About five days ago, but I've been having bad headaches for a while now. —Mm, have you been working too hard lately? Are you worrying about something? —______. I've been quite anxious lately about work at the office.
【正确答案】 D
【答案解析】对话中医生问史密斯夫人是否最近工作强度太大，担心得太多，从而导致头疼，根据其回答“我最近总是对办公室的工作感到十分担忧”，可知D项“我想是的”为正确答案。