23. I know nothing about him except that he works in ____company. A. certain B. some C. one D. an本题选什么?为什么?

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23. I know nothing about him except that he works in ____company. A. certain B. some C. one D. an
本题选什么?为什么?

B
certain前要加a
some的意思是某,前面不加a.
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多谢你的问题!