Family and Friends 3 - Unit 4: We are having fun at the beach! - Lesson 4
<p><strong>1. Ôn tập từ vựng: </strong></p><p>swim, sail, dive, surf, kayak, windsurf, snorkel, waterski, polluted, clean, dangerous, safe, beautiful, ugly<br><br><strong>2. Ôn tập cấu trúc ngữ pháp: Present countinuous</strong><br>- I'm/not (swimming).<br>- He/ She/ It is/isn't (surfing).<br>- We/They are/aren't (sailing).</p><p><br><strong>3.