For the past two years, I have been working on students' evaluation of classroom teaching.

I have kept a record of informal conversations【C1】______ some 300 students from at【C2】______ twenty-one colleges and universities. The students were generally【C3】______ and direct in their comments【C4】______ how course work could be better【C5】______ . Most of their remarks were kindly【C6】______ with tolerance rather than bitterness—and frequently were softened by the【C7】______ that the students were speaking【C8】______ some, not all, instructors. Nevertheless,【C9】______ the following suggestions and comments indicate, students feel【C10】______ with things as they are in the classroom.

Professors should be 【C11】______ from reading lecture notes. "It makes their【C12】______ monotonous. "If they are going to read, why not 【C13】______ out copies of the lecture？ Then we【C14】______ need to go to class. Professors should 【C15】______ repeating in lectures material that is in the textbook."【C16】______ we've read the material, we want to 【C17】______ it or hear it elaborated on,【C18】______ repeated" "A lot of students hate to buy a 【C19】______ text that the professor has written【C20】______ to have his lectures repeat it."

【C1】

A．counting

B．covering

C．figuring

D．involving