A)try to please their students B) treat their students as consumers C)understand their students well D)make sure their students understand 27. Teachers are evaluated by students mainly on A) how well they perform in class B) how carefully they prepare their lessons C) how fluently they express themselves in class D) how hard they work in and after class 28. What are studen ts expec ted to do before attending aclass? A) Go over the lessons thoroughly B)Understand the textbooks well C) Do the reading assignments D)Prepare an outline for discussion 29. When a program starts, students should first A) learn how to do research and write papers B)have some learning experience C) learn about the course concretely and clearl D) know how to participate in discussions 30. Higher level classes are taught mainly through a) giving a lot of lectures to students B)involving students in discussions C) asking students questions in class D)answering students' questions in classA) try to please their students B) treat their students as consumers C) understand their students well D) make sure their students understand 27. Teachers are evaluated by students mainly on . A) how well they perform in class B) how carefully they prepare their lessons C) how fluently they express themselves in class D) how hard they work in and after class 28. What are students expected to do before attending aclass? A) Go over the lessons thoroughly. B) Understand the textbooks well. C) Do the reading assignments. D) Prepare an outline for discussion. 29. When a program starts, students should first . A) learn how to do research and write papers B) have some learning experience C) learn about the course concretely and clearly D) know how to participate in discussions 30. Higher level classes are taught mainly through . A) giving a lot of lectures to students B) involving students in discussions C) asking students questions in class D) answering students’ questions in class