Ⅲ. Reading
Comprehension
从下列每篇短文的问题后所给的四个选择项中选出一个最佳答案。
Passage One
Questions 21 to 25 are based on the following passage.
Many teachers believe that the responsibility for learning lies with the students. If a long reading assignment is given，instructors expect students to be familiar with the information in the reading even if they do not discuss it in class or give an examination. (Courses are not designed merely for students to pass exams). The ideal student is considered to be one who is motivated to learn for the sake of learning，not the one interested only in getting high grades. Grade-conscious students may be frustrated with teachers who do not believe it is necessary to grade every assignment. Sometimes homework is returned with brief written comments but without a grade. Even if a grade is not given，the student is responsible for learning the material assigned.
When research is assigned，the professor expects the student to take the initiative and to complete the assignment with minimal guidance. It is the student's responsibility to find books，periodicals，and articles in the library. Professors do not have the time to explain how a university library works，they expect students，particularly graduate students，to be able to exhaust the reference sources in the library.
Professors will help students who need it，but prefer that their students not be overly dependent on them. (This differs from teacher-student relationships in other countries. )In the United States，professors have other duties besides teaching. Often they are responsible for administrative work within their departments. In addition，they may be obliged to publish articles and books. Therefore the time that a professor can spend with a student outside of class is limited. If a student has problems with classroom work，the student should either approach a professor during office hours or make an appointment.
“Courses are not designed merely for students to pass exams. ”This means teachers______.
A. want students to fail exams
B. care only about exam grades
C. believe that passing exams is not the only purpose of a course
D. design courses for lectures only