For many teachers，it is the students who are truly responsible for learning．When a reading assigmnent____61____（give），teachers initially design their students，even though they don’t discuss it in class or take any examination，to be familiar with the____62____（inform） in it．The ideal student is considered to be____63____who is motivated to learn，not the one____64____（interest） only in getting high grades．Sometimes homework is returned with brief written comments but____65____a grade．Even so，the students are responsible for learning the material assigned．After assigning research work，the professor desires their students to take it____66____（active） and to complete it with minimum guidance．It is the students’duty to consult books，magazines，and articles in the library．Professors don’t have the time to explain____67____a university library works；they expect students to be able to exhaust the reference resources in the library．Professors will help the students who need it，but prefer that their students should not be too____68____（depend） on them．Meanwhile，professors may have many other duties besides teaching．____69____，the time a professor can spend with a student outside of class is limited．If a student has some problems，he／she should____70____approach the professor during office hours or make an appointment earlier．