求详解谢谢Mary is living at _______ place in South Africa. A.cert

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求详解谢谢Mary is living at _______ place in South Africa. A.certain B.some C.an D.any
.Mary is living at _______ place in South Africa.
A. certain B.some C. an D. any

你好，这道题正确答案选Bsome adj. 一些; 某个; 大约; 相当多的 pron. 一些; 若干; 其中的一部分; （数量不确切时用）有些人这句用它的形容词意，C项把"an改为"a"勉强可以选，place前用a。any用于否定句和疑问句，故D不选。下面着重说下A. some与B. certain的区别。【特别注意第三点括号里的】二者都可以表示“某些，某个”。some侧重说话人对所述之人或事不明确或一无所知，它只和单数名词连用，其前没有不定冠词。例如：
Some person called on you when you were out. 你出去时有个人来拜访你。
There must be some reason for what he’s done. 他这么做一定有某种理由。certain多表示说话人对所述之人或事或知之不详或知而不言，它与单数名词连用时，其前必须加不定冠词。另外，表达此意时，certain还可以同复数名词连用，表示“某些”。例如：
A certain person telephoned you while you were out. 你出去时有个人给你打过电话。
For certain reasons I'll be unable to attend the meeting. 由于某些原因我不能参加此次会议。在单数普通名词前，【a certain和some通常可以互换】。在专有名词前通常用a certain,不用some. Some 可以和or…,or other,or another连用，表示未知的对象，而(a)certain没有这样的搭配。如：
A certain Smith is waiting at the gate. 有个叫史密斯的人正在门口正等着你。
He used to work at some/a certain place in Guangzhou. 他过去在广州某个地方工作。
She won a competition in some newspaper or other. 她在某个报纸上获过奖。所以，A项若把“certain”改为“a certain” 也是正确答案。希望能帮到你，满意还望采纳~~

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