lecture-solutions-elementary: Class Slides. Unit 1. Lesson B. Present Simple: Affirmative and Negative

Class Slides. Unit 1. Lesson B. Present Simple: Affirmative and Negative

Class Slides. Unit 1. Lesson B. Present Simple: Affirmative and Negative.

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Class Slides. Unit 1. Lesson B. Present Simple: Affirmative and Negative