单项选择题

Passage Two Questions 66 to 70 are based on the following passage: Teacher evaluations (评价) have been carried out in a lot of schools in recent years. Every term the students are given the opportunity to evaluate their teachers. The students are supposed to judge their teachers’ lectures, interests in students’ problems, methods of exercise, and general ability to conduct a class. Then, when the teacher has left the classroom, they must write their evaluation on the forms provided. They are not supposed to exchange views or discuss their responses. After everyone has completed the forms, one student collects and puts them in envelopes. It is very difficult to evaluate another person’s performance fairly. For example, Santa recently wrote irresponsible remarks about her teacher because she was failing the course. Her friend Sam wrote a marvelous description of the same teacher because he was receiving an A in the course. Both Santa and Sam were not fairly evaluating the teacher. They were influenced by the grades they were earning and were unfair in their judgments. Another irresponsible form of evaluation occurred when James rated his teacher excellent because the teacher is “easy”. He gives few tests and only assigns (分配) one paper during the entire term. His lectures are often filled with jokes and endless stories about his family. On the other hand, James rated Professor Jones poor because he assigns homework daily, gives pretest previews and post-test reviews, and packs his lectures with information. Santa, Sam, and James have not thought about their teachers’ teaching abilities. They have written unfair evaluations and have not given thought to their evaluations. They have not made fair judgments, but instead have been influenced by their own personality and have equated (使等同) little work with excellence in teaching. The students didn’t evaluate their teachers fairly because __________.