Question

【题目】The research that he has devoted himself to _______ the farmers have a better harvest.

A.helpingB.to helpC.helpD.helps

Answer 1

【答案】D

【解析】

句意：他所潜心做的研究帮助农民获得更好的收成。

考查时态。A. helping动名词、现在分词； B. to help不定式；C. help原形；D. helps一般现在时、单三形式；陈述现阶段的事情，判断句子是一般现在时；主语the research是单数第三人称，谓语动词+s/es；故选D。