First of all, though CAI has something superior to blackboard in the way of showing pictures, movies of something else, I think CAI lacks a way letting teachers and students communication. Studying is a progress and you should not just show a slide next to a slide instead of writing the way you think on the blackboard. In addition, students can have access to the PPT even though they do not listen to the class. CAI encourages students absence in the class in another way. Sometimes, some teacher just read after what PPT reads and it’s very boring.
A、CAI lacks a way letting teachers and students communication.
B、CAI is superior to blackboard in some way in teaching.
C、CAI makes the class boring to some degree.
D、CAI sometimes leads to students' absence.