Question

(2013·福建高考)________basic first­aid techniques will help you respond quickly to emergencies.

A．Known	B．Having known
C．Knowing	D．Being known

Answer 1

C

选C　考查非谓语动词。句意：了解基本的急救技巧能够帮助你快速应对紧急情况。分析句子结构可知，空处在句中充当主语，应用动词­ing形式。having known强调“完成”，不符合句意，可排除。故选C。