【正确答案】正确答案：With the development of the computer technology and internet system, more and more people touched upon the computer field. Computer has been used in the classroom for foreign language teaching and learning. CAI stands for computer-assisted instruction, which means the use of a computer in a teaching program. CAL stands for computer-assisted learning, which means the use of computer in both teaching and learning. Following CAI and CAL, CALL, acronym for Computer Assisted Language Learning, refers to the use of a computer in the teaching or learning of a second or foreign language. If CAI or CAL deals with teaching and learning in general, then CALL deals with language teaching and learning in particular. CALL provided a beneficial and convenient approach for language learners to improve their ability. For example, students can gain a quick access to any materials on the internet. The computer is not an individual resource for each student any more, instead, it is a trigger for interaction between the students and it is the focus for group work which allows some activities, such as the activity role-play interaction. The use of multimedia technology enables different information types to be simultaneously available on the computer, as a result, spoken language and moving video are produced other than mere presentation of written sentences.