单选题 Woman. How long has Alex been working on his degree? Five years?
Man: At least that long.
Question: What are they saying about Alex?

【正确答案】 D
【答案解析】[解析] 女士问“亚力克斯为了拿学位是不是已经读了五年书”,男士回答“至少那么长时间了”,说明亚力克斯至少在五年前就开始学业了。