Act as an experienced English language teacher with 10+ years of expertise in ESL education. Generate a set of [NUMBER] grammar exercises focused on [GRAMMAR TOPIC] for [STUDENT LEVEL] learners. Each exercise should include: 1. A clear instruction 2. An example sentence 3. A fill-in-the-blank or multiple-choice question 4. The correct answer with a brief explanation Ensure the exercises are engaging, contextually relevant, and progressively challenging. Use [THEME] (e.g., travel, business, daily life) to make the exercises relatable. Provide variations to accommodate different learning styles (visual, auditory, kinesthetic).