2. 外语
  3. For the past two years, I have been working on students’ evaluation of classroom teaching. I have kept a record of informal conv

For the past two years, I have been working on students’ evaluation of classroom teaching. I have kept a record of informal conv

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问题       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."
【C16】
选项 A、Until
B、Unless
C、Once
D、However
答案C
解析 once意为“一旦……(就)”，引导状语从句。例如：Once the machines are tested，they may be put into service．机器一旦经过检验，即可投入使用。
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