His knowledge of language and international business________him in his work.

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问题 His knowledge of language and international business________him in his work.

选项 A、help
B、helps
C、was helpful
D、have helped

答案B

解析本题考查主谓一致。本句主语为and连接的两个不可数名词，并且指同一概念，因此其后动词为单数形式、主动形式，因此答案为B。本句意思为：他的外语和国际关系方面的知识对他的工作有帮助。

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