题目

请阅读下面文字，并按照要求用英语写一篇150词左右的文章。 Hermitcrabs are nature's recyclers. They eat waste and help keep oceans and shores clean.Unlike other crabs, the hermit crab has a thin outer shell over its soft tail. Thismakes the hermit crab easy prey for hungry predators (天敌). Hermit crabs stay safe by living in old seashells. A hermit crab ispicky(狡猾); it tries on many shells until it finds one thatfits just right. In recent years, however, many hermit crabs have had trouble findingtheir perfect homes. Now the problem is that there are not enough she下列有关软体动物的叙述，错误的是（　　） A、软体动物身体表面有外套膜B、河蚌属于双壳类C、软体动物体外都有贝壳保护D、软体动物运动器官是足