To succeed in a scientific research project______.

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问题 To succeed in a scientific research project______.

选项 A、one needs to be persistent
B、persistence is needed
C、one needs be a persistent person
D、persistence is what one needs

答案A

解析 to succeed in a scientific research project是动词不定式短语，在句子中作目的状语，其逻辑主语是句子的主语，主语必须是人。need为实义动词(情态动词没有第三人称单复数变化)，与另一动词连用时后接不定式符号构成need to be，故A项为正确答案。

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