【題目】_________basic first-aid techniques will help you respond quickly to emergencies.
A.Known
B.Having known
C.Knowing
D.Being known

【答案】C
【解析】句意:了解基本的急救知識可以讓你盡快的回應(yīng)緊急狀況。分析句子成分,可知謂語是will help,所以前面的是主語,用動名詞做主語,故選C項。

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