Complete the sentences. Circle the correct words. (Hoàn thành các câu. Khoanh tròn những từ đúng) 1. A leatherback is a type of (sea pig / sea turtle). 2. There are seven kinds of (sea turtles / dugongs). 3. Dugongs are (noisy / shy). 4. Dugongs are also called (sea cows / starfish). 5. Leatherbacks and dugongs are really (big / small).