According to the survey, modern industry quickly in developing countries in the past half

发布时间：2020-08-16 22:51:57

According to the survey, modern industry     quickly in developing countries in the past half century.
A. develop
B. has developed
C. had developed
D. developed

网友回答

A. develop
(答案→)B. has developed
C. had developed
D. developed
解析：考查时态题。根据时间状语in the past half century可知，应用现在完成时。
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