根据课文P12,13填空。
Little Justin is 1. in a river in spring. He is 2. and 3.. He can’t find his mother. On his way to find Mum, he changes a lot. A few days later, he has a 4.. Then, he has four 5.. Finally, he has 6. tail. His 7. are big. His 8. is big. He can catch 9..