题目:The development of industry has been _________ gradual process throughout _________ human existence, from stone tools to modern technology.
2020-02-27
A. /; the B. the; a C. a; / D. a; a
正确答案:C
试题解析:
A. /; the B. the; a C. a; / D. a; a
正确答案:C
试题解析: