单选题 Woman: Bill, I want to have a few words with you about your performance in class lately.
Man: I know I"ve gone down. I just haven"t been studying as much as I ought to.
Question: What is Bill"s problem?
【正确答案】 B
【答案解析】女士说:比尔,就你最近在课堂上的表现,我想和你聊几句。男士说:我知道我退步了,我没有努力地去学习。选项B符合文意。选项C的意思是“他最近离开了”。选项D的意思是“他感到很失望”。