参考答案：B

解析：[听力原文]
Apparently some of the reading teachers are not sufficiently explaining vocabulary and grammar matters to their students, and only read out the answers found in the answer keys of their textbooks. Students are obviously unhappy about this situation. My recommendation is that you attempt to make clear to the students how you are conducting your class, and what exactly it is that you’re doing. Perhaps it would be helpful if you were to also frequently answer/discuss/explain the answers of the exercises you’re specifically dealing with, and not just simply read the answer key to them.