Question

【题目】_______ nature reserves _______ us learn more about protecting animals.

A. Studying; helps B. Studies; to help

C. Study; helping D. Studying; help

Answer 1

【答案】A

【解析】句意：研究自然保护区有助于我们更多地了解保护动物。动词短语或动词做主语时，用动名词，谓语动词用单数形式；结合句意和语境可知选A。