请认真阅读下面短文，从方框中选择适当的单词或短语，在答题卡标有题号的横线上，填入其正确形式。每个单词或短语仅用一次。

without   mistake   such as   grow   in this way

Hermit crabs (寄居蟹) are small animals that live in the ocean or on the beach. The crab has its own hard shell (外壳) but it only covers part of its body. The soft part cannot be protected     1     a shell. So the crab will find an empty shell and climb inside to stay safe.

As a hermit crab     2    , it needs a bigger shell. Groups of hermit crabs gather to exchange shells. Sometimes, they fight over shells or line up to get the best one.

Hermit crabs eat just about any food they can find,     3    plants, dead fish or even food left on the beach.     4    , they help keep beaches clean.

However, pollution can make it harder for hermit crabs to find real shells. Sometimes plastic bottles and caps are     5     for real shells. Once inside, many cannot get out and slowly die.

Beach cleanups, recycling, and using less plastic can make a big difference.

1.1.

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B

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解析：选without。答案：without。类型：介词用法。解析：空格后为名词短语 “a shell”，结合句意 “柔软的部分若没有贝壳就无法得到保护”，需填入表 “没有” 的介词，方框中 “without” 符合语境，且无需变形。

2.2.

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D

解析：选grow。答案：grows。类型：动词时态与主谓一致。解析：此处描述寄居蟹的生长规律，用一般现在时；主语 “a hermit crab” 为单数，谓语动词需用第三人称单数形式，方框中 “grow” 的第三人称单数 “grows” 符合要求。

3.3.

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D

解析：选such as。答案：such as 类型：固定短语辨析。解析：空格后 “plants, dead fish or even food left on the beach” 是对前文 “any food they can find” 的举例说明，方框中 “such as” 表示 “例如”，用于列举同类事物，符合语境，且无需变形。

4.4.

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解析：选In this way。答案：In this way 类型：固定短语用法。解析：前文提及寄居蟹的食性，后文说明其 “保持海滩清洁” 的作用，此处需填入表 “通过这种方式” 的短语，方框中 “In this way” 衔接上下文逻辑，符合语境，注意句首首字母大写。

5.5.

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解析：选mistaken。答案：mistaken 类型：被动语态。解析：结合句意 “塑料瓶和瓶盖会被误认为是真正的贝壳”，此处需用被动语态 “be + 过去分词”；方框中 “mistake” 的过去分词为 “mistaken”，“be mistaken for” 为固定搭配，意为 “被误认为”，符合语境。