问题
选择题
_______ basic first-aid techniques will help you respond quickly to emergencies.
A．Known
B．Having known
C．Knowing
D．Being known
答案
答案：C
题目分析：考查动名词做主语：分析句子成分，可知谓语是will help，所以前面的是主语，用动名词做主语。句意：了解基本的急救知识可以让你尽快的回应紧急状况。所以选C。
