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Over the past ten years, China has__________a series of great changes in its infrastructure and economy.
A．witnessed
B．found
C．occurred
D．taken
B．found
C．occurred
D．taken
参考答案
参考解析
解析：考查动词辨析。witness意为“见证”，可以用物作主语。句意为“过去十年，中国在基础设施和经济方面都发生了一系列的变化”。故选A。
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