【題目】A great scientist is someone who d his/her life to helping others.

【答案】devotes
【解析】devotes 句意：一個(gè)偉大的科學(xué)家就是把自己的一生奉獻(xiàn)給幫助別人的人。用一般現(xiàn)在時(shí)態(tài)，主語(yǔ)是單數(shù)第三人稱someone，故填devotes。

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