<正> Ⅰ.专练Directions:In this part there is a short passage with five questionsor incomplete statements.Read the passage carefully.Then answer thequestions or complete the statements in the fewest possible words.Normally a student must attend a certain number ofcourses in order to graduate,and each course which he attendsgives him a credit which he may count towards a degree.Inmany American universities the total work for a degree con-sists of thirty-six courses,each lasting for one semester.A typi-