So we are having college fair in our school tomorrow, and I want to know what are some good questions to ask that they would like to hear. (I don't want general questions please.)
It is interesting that you phrase your inquiry here as "questions to ask that they would like to hear." I suspect you have a small misunderstanding about the nature of college fairs. A college fair is a gathering of college/university recruiters who want to help you discover their institution and help you make a good match between your desires, interests and your college/university. A college fair is meant to tell you all you need to know about them in order for you to select them (they are asking you to select them at this stage).
Later, when you go for your interviews, the institution will be in the information gathering phase: they will want to know all they can about you so they can select or not select you. It is at this phase that you may want to give consideration to asking what "they would like to hear." Although this strategy may or may not be a wise one to incorporate into your interview phase.
At the college fair, you are the interviewer as later the college will be the interviewer. Some things you need to think and ask about are future career and higher degree oriented questions. At this point you may or may not know your field of interest or your aspirations toward master and doctoral degrees. Yet you might assume you do know and ask some questions that will help you along your way. You might ask how many undergraduae classes are taught by professors. You might ask about opportunities for undergraduates to contribute papers to conferences. You might ask about what research is underway at the college/university in fields you may potentially be interested in or are interested in if your decisions about a major are already made (undergrads rarely participate in research at universities though once in a while there may be an opportunity to do so at a college).
You might ask about future employment seeking opportunities provided. Are there corporate and other job recruiters who come to the college/university looking for job candidates? Are there campus sponsored opportunities to apply for employment before graduation (so you step from the campus to the corporation)? What career counseling opportunities are available for students and for alumni? You might also ask about non-major activity opportunities, like: Is there an all-college choir or band? Are their intramural sports for non-athletic majors? Is there an astronomy club for non-majors?
These are some of the things you will want to know from them. These sorts of questions will also, ironically, help you later when they want to know things from you since you can make well informed and well reasoned remarks and inquires about your field(s) of interest, your future prospects and the campus's opportunities.
I second the advice about asking questions specific to your major. For example, I wanted to be an English major, so I asked questions about the course requirements for that major.
You can also ask them what they think they offer that is different from other, similar colleges. Remember -- they're there to meet potential students, and they want to recruit you just like you want them to have a positive impression of you. Since it's their job to know everything they can about their university, and probably have a fair amount of information about nearby or similar universities, this is a great opportunity for you to let them set you apart. For example, if you're applying to a school like, say, UMass Amherst, you might ask the how they set themselves apart from nearby public universities, like UConn, or nearby private universities with similar enrollment figures, like Boston University. That might lead them to talk about some more qualitative (as opposed to quantitative) information about the zeitgeist or feeling of the campus--information you can't find in an admissions packet.
Please be sure to find out what financial awards are available at that college and whether or not you would be eligible to apply for those. Bring a copy of your transcript with you. Find out whether they have the major you wish to pursue, what living facilities they offer in terms of dorms or apartments, and whether you can arrange a trip for a visit to their university. It is important to see how the students are living, speak to some of them, even try the food they are serving at the college, when making your decision.
A college fair is for YOU to find out information about a particular college or explore several college options, not really to ask what they want to hear. The above posts give you excellent ideas about what to ask; I would suggest that you do some thinking of your own about what you want as a major, which schools have that major, and which seem to fit you and your requirements. Interview them as much as they interview you. If you are undecided about a major, ask them what is available to a student to help them choose a course of study which suits them. I also would ask if there is a class you could take now which would help you with admission if that is an issue. Good luck and know that most of the people I went to college with changed their majors at least once.
Perhaps I am taking a little liberty in interpreting your question, but it seems like you are looking for ways to make a positive impression by your questions. With that in mind, you would need to have a full understanding of what that school is looking for in its applicants, which will take a little research on your part.
For example, if you are looking to make a positive impression on a school that prides itself on undergraduate research, I would plan to ask some questions about the research opportunities that would be available to you as a student at their university. If the school has a reputation for preparing 21st century students for a global workforce by having fifty percent of their students study abroad, prepare to ask some questions about international studies.
Whether it be for a college interview or a job interview, its always smart to do a little research about the people you are going to be talking to and plan your questions accordingly.
Determining what would be "good questions" will depend upon what you want to learn.
If you have a particular area in mind as a possible major, you will want to know the types of coursework, internships, and successful placement rates that the colleges you meet with have in that area. Ask about class sizes, arrangements for combining majors if that is a possibility, and for a list of prerequisite courses before starting your major-specific coursework.
If you are undecided, ask if there are procedures to work with students who need exposure to a wide variety of areas and help in determining an area of focus that matches abilities and interests. A good career counseling program may be helpful if this is your situation.
If you have particular interests in such areas as overseas study, extracurricular activities, club or organizational involvements related to your major, or other areas of interest, be sure to ask about them. The college fair is your opportunity to learn lots, but it will be up to you to direct the conversation!