285.
M: Hello?
W: Hello. Is that Mr. Jackson?
M: Yes, it is.
W: Mr. Jackson. I am a reporter from the TV station at our school. As far as I know, you are a very successful teacher, and quite popular among the students, so I want to ask you some questions about your teaching and your students.
M: OK.
W: First question, do you often give homework to your students after class?
M: It depends. Maybe once or twice a week.
W: Do you think it is good for your students to do a lot of homework?
M: No, I don't think so. Too much homework takes too much of their free time. I seldom give homework to my students on the weekend.
W: Do you agree the students need a lot of exercises in their spare time?
M: Well, yes, but they also need time to relax and have a rest, especially on weekends.
W: You are a great teacher. By the way, what do you do in your free time?
M: I'm a very good football player. My team won the first place in our city last year.
W: Congratulations! Well, thank you for your help.

答案解析：
(1) 正确答案为C。根据开头的打电话用语Hello. Is that Mr. Jackson?你好，请问是杰克逊先生吗？可知，二人是通过电话在对话，因此C项正确。
(2) 正确答案为C。根据As far as I know, you are a very successful teacher, and quite popular among the students.据我所知，您是位非常成功的教师，在学生当中非常受欢迎。可知，男子非常受学生的喜爱，因此C项正确，男子可能是学生最喜爱的老师。
(3) 正确答案为A。根据I want to ask you some questions about your teaching and your students.我想问您一些有关教学和学生的问题。可知，女子采访男子是要获取有关他和他的教学工作的信息，因此A项正确。