[单项选择]Many instructors believe that an informal, relaxed classroom environment is (21) to learning and innovation. It is not uncommon for students to have (22) and friendly relationships with their professors. The (23) professor is not necessarily a poor one and is still (24) by students. Although students may be in a(n) (25) position, some professors treat them as (26) . However, no matter how (27) professors would like to be, they still are in a position of (28) . Professors may (29) social relationships with students outside of the classroom, but in the classroom they (30) the instructor’s role. A professor may have coffee with students (31) the next day expect them to (32) a deadline for the (33) of a paper or to be prepared (34) a discussion or an exam. The professor may give (35) attention outside of class to a student in (36) of help but probably will not treat him or her differently when it (37) evaluating school work. Profes
A. inferior
B. minor
C. low
D. subordinate

[单项选择]Many instructors believe that an informal, relaxed classroom environment is (21) to learning and innovation. It is not uncommon for students to have (22) and friendly relationships with their professors. The (23) professor is not necessarily a poor one and is still (24) by students. Although students may be in a(n) (25) position, some professors treat them as (26) . However, no matter how (27) professors would like to be, they still are in a position of (28) . Professors may (29) social relationships with students outside of the classroom, but in the classroom they (30) the instructor’s role. A professor may have coffee with students (31) the next day expect them to (32) a deadline for the (33) of a paper or to be prepared (34) a discussion or an exam. The professor may give (35) attention outside of class to a student in (36) of help but probably will not treat him or her differently when it (37) evaluating school work. Profes
A. instructive
B. constructive
C. conducive
D. healthy