As for the "Developing Skills Grammar & Usage Set B Second Edition Answers PPT," it appears to be a resource for students and teachers to practice and reinforce grammar and usage skills. The PPT likely provides answers to exercises and quizzes, helping learners to assess their knowledge and progress.
: 1. am playing, 2. am shopping, 3. are going, 4. are having. As for the "Developing Skills Grammar & Usage
Publishers often provide digital resources for verified teachers. 2. am shopping