第27题: [单项选择]Questions 22 to 25 are based on the conversation you have just heard. A. A chemistry assignment. B. A study that their chemistry professor did. C. A class that the woman is taking. D. A job possibility. 参考答案:D 答案解析:[听力原文]22-25 M: Hi, Mary. Do you want to start the lab report after we finish this experiment