- 试题详情及答案解析
- _______ basic first-aid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known |
| C．Knowing | D．Being known |
- 答案：C
- 试题分析：句意：了解基本的急救技术将帮助你对紧急情况作出迅速反应。Knowing basic first-aid techniques是动名词短语做主语。A. Known过去分词表被动完成；B. Having known做状语，表动作在先；C. Knowing 和后面的basic first-aid techniques一起构成短语做主语；D. Being known是现在分词的被动形式。由句意可知选C。
考点：考查动名词做主语的用法。