单选题 Man: Prof. Johnson sure was acting strangely today.
Woman: I noticed that too. He was talking so quietly and then not giving us any homework. Can you believe that?
Question: What can be inferred about Prof. Johnson?

【正确答案】 A
【答案解析】[解析] 女士说约翰逊教授今天讲课时很安静,也没有留作业,令人难以置信,可见平时约翰逊教授都会留作业。