Student participation (参与)in tike classroom is not only accepted but also expected of the student in many courses. Some professors base part of the final grade on the student’ s oral participation. Although there are formal lectures during which the student has a passive role(i. e. , listening and taking notes) , many courses are organized around classroom discussions, student questions, and informal lectures. In graduate discussions the profess or has a “manager”role and the students make presentations and lead discussions. The students do the actual teaching in these discussions. A professor’ s teaching method is another factor (因素)that determines the degree and type of student participation. Some professors prefer to control discussion while others prefer to guide the class without controlling it. Many professors encourage students to question their ideas. Students who object to the professor’ s point of view should be prepared to prove their positions. In the teaching of science and mathematics, the controlling mode of instruction is generally traditional, with teachers presenting formal lectures and students taking notes. However,new educational trends have turned up in the humanities and social sciences in the past twenty years. Students in education,society, and history classes, for example, are often required to solve problems in groups, design projects, make presentations, and examine case studies. Since some college or university courses are“practical” rather than theoretical，they pay more attention to “doing” for themselves. “Participation in the classroom is not only accepted but also expected of the student” in many courses except in____. A.science and mathematics B.the humanities and social sciences C.informal lecture courses D.discussion courses From the passage we know that education in the humanities and society____.A.has not changed much B.pay attention to students’ studying instead of teachers’ teaching C.is much more important than that of science and mathematics D.has become more practical than theoretical The reason why some professors ask students to make presentations and lead discussions is that____. A.these professors are often not well prepared before class B.these professors want to stress “doing” C.these professors want to test the students’ abilities D.these professors are not willing to teach theory Which of the following sentences is true according to the passage?A.Student participation is not common in the classroom in many courses like society. B.Some professors want to control the classroom discussion. C.Some professors usually want the students to take part in the teaching of science and mathematics. D.New educational trends have turned up in teaching of natural sciences such as chemistry.