已知X、Y、Z、W（含同一元素）有如下所示转化关系，且X能与W发生反应生成一种易溶于水的盐，则X可能是（　　）

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    Everyone has a family name. In China, the family name is the first name, but in English countries(国家)the family name is the last name. Do you know how English people get their family names? And what do they mean(意味着)? English people usually get their family name in these ways (方式).

    Some family names come from the places(地方)of their homes. A man live(住)on or near a hill, his family name may be (可能是) Hill. In England(英国), people's names may be Wood, Lake because they live near the wood or the lake.

    Some family names come from a person's job(职业). If a man is a cook, his family name may be Cook.

    And many people get their family names from their father's family names. If you hear(听到) the name "Jackson", you can know that he is the son of Jack.

世界上面积最大、最小的大洲分别是（  ）

选出每组中画线部分读音不同的一项。

①____A. his       B. ship       C. bike

②____A. dad      B. bag        C. face

③____A. nose      B. hot       C. home

④____A. me       B. egg       C. pen

⑤____A. use       B. bus       C. duck