The role of the teacher may well be changed, for machine instruction will affect several traditional practices. Students may continue to be grouped in “grades” or “classes”, but it will be possible for each to learn at his own level, advancing as rapidly as he can. The other kind of “grade” will also change its meaning. In traditional practice, a C means that a student has a slight knowledge of a whole course. But if machine instruction assures a good command at every stage, a grade will be useful only in showing how far a student has gone. C might mean that he is halfway through a course. Given enough time he will be able to get an A; and since A is no longer a motivating( 激发的 ) device,this is fair enough. The quick student will meanwhile ( 与此同时 ) have picked up A’s in other subjects. 1. According to the passage, a student taught by machines will learn ­__________. A) at his own speed B) traditional practices C) more rapidly D) advanced classes 2. “Grade” has two meanings, one means “class”while the other means __________. A) a mark indicating a student’s level of study B) a slight knowledge of the course C) a good command of a subject D) a traditional practice for teaching 3. In machine instruction, a student can get A’s for all the subjects he learns if he __________. A) is beyond the halfway through the courses B) is given a motivating device C) studies as well as his classmates D) has accomplished the studies 4. Compared with a slow student in machine instruction, a quick student can __________. A) learn more subjects B) have a better command of each subject C) have more time for studies D) get better grades 5. The title of this passage could be __________. A) How Students Can Learn Better B) Advantages and Disadvantages of Machine Instruction C) Changes Brought by Machine Instruction D) The Role of Teachers in the Future