The development of industry has been ____gradual process throughout _____ human existence, from stone tools to modern technology.
A．不填; theB．the; aC．a(chǎn); 不填D．a(chǎn); a
A

試題分析：本題第一空后的名詞process過程，這是一個不可數(shù)名詞，不能使用a修飾，也不需要特指。第二空使用the特指人類的存在。句義：工業(yè)的發(fā)展貫穿與人類的存在歷史之中，從石制工具到現(xiàn)代技術。故A正確。
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