.The development of industry has been gradual process throughout human existence,from stone tools to modern technology. (2012·浙江,2)
A. /;the
B. the;a
C. a;/
D. a;a
网友回答
A. /;the
B. the;a
(答案→)C. a;/
D. a;a
解析:
第一空process是可数名词,第一次出现一般用不定冠词,且此处表示“一个”的概念;第二空existence是不可数名词,此处表示抽象概念,故用零冠词。