英语 七年级 填空题 较难 ★ 精品

描述动物外貌与习性 — 英语填空题

译林版·英语(初中) Unit 5 Animal friends AI 三重审校通过

题目
请根据描述补全句子:The animal is not a fish. It has four short legs, a hard shell and no teeth. It lives both on land and in water. When it feels afraid, it can pull its head and legs into its shell. It is a ___.