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解析：Chomsky held that a language learner has, somewhere in his brain, a set of grammar rules with which he can use to make sentences.That is, language is characterized by rule-governed creativity. He claimed that every normal human being is born with an LAD (language acquisition device). The LAD included basic knowledge about the nature and structure of human language. Chomsky’s idea that students should be allowed to create their own sentence based on an understanding of a rule is widely used in many classrooms.Chomsky created two linguistic terms: language competence (knowledge of grammar rules ) and language performance (application of language ).It is competence that a learner gradually acquires, and it is this language competence that allows the learner to be creative as a language user." Meaningful performance rather than drill is the only way to master a language.