单项选择题:
Of the three procedures followed in a cognitive classroom, which can be viewed as the performance stage
A. Exercises.
B. Application activities.
C. Introduction of new materials.
D. None of the above.
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答案：B
解析:认知法的课堂教学中通常遵循以下三个步骤：介绍新材料；练习；运用活动。其中运用活动是语言运用阶段。