填空题

Instructors at American colleges and universities use many different teaching (36) . Some instructors give (37) every day. They grade homework. Students in their classes have to take many (38) a midterm exam, and a final exam. Other instructors give only writing tasks. Some teachers always follow a course (39) and usually use the textbook. Others send students to the (40) for after-class work. The (41) in some classrooms is very formal. Students call their nstructors "Professor Smith", "Mrs. Jones", and so on. Some teachers wear (42) clothes and give lectures. Other classrooms have an (43) atmosphere. Students and teachers discuss their ideas. (44) . At most American colleges and universities, facilities for learning and recreation are available to students. (45) . They can buy books, notebooks, and other things at campus stores. (46) Students can relax and have fun on campus, too. Some schools have swimming pools and tennis courts. Most have snack bars or cafeterias.