This was but an additional testimony of th

问题单项选择题

This was but an additional testimony of the superiority of the socialist economic system over the capitalist economic system.

A．proof

B．witness

C．evidence

D．validity

答案

参考答案：A

解析： A．proof证据，试验，考验；B．witness证人，目击者，证据，证明；C．evidence迹象，根据，证据，证物；D．validity有效性，合法性，正确性。选项A，B，C都有“证据”之意，但proof主要指事实、资料、文件/文献等用来证明某事正确的证据，因此A为答案。