Many teachers believe that the responsibilities for learning lie with the students. 1__ a long reading assignment is given, instructors expect students to be familiar with 2 (inform) in the reading even if they do not discuss it in class or take an examination. The ideal student is considered to be one who is motivated to learn for the sake of learning, not one interested only in getting high grades. Sometimes homework is returned 3 brief written comments(评语) but without a grade. Even if a grade is not given, the student is responsible for _____4_______(learn) the material assigned. When research 5 (assign),