Question

【题目】____ basic first-aid techniques will help you respond quickly to emergencies.

A. KnownB. Having known C. KnowingD. Being known

Answer 1

【答案】C

【解析】本题考查非谓语动词。will help是句子的谓语部分，____ basic first-aid techniques是句子的主语部分，其逻辑主语是you，与Know构成主动关系，所以用动词-ing做主语。D是被动关系。

句意：掌握基本的急救技能将会有助于你在遇到紧急情况时迅速做出反应。