According to the survey, modern industry_____ quickly in developing countries in the past half century.
A.developB.has developedC.had developedD.developed
B
考查時(shí)態(tài)題。根據(jù)時(shí)間狀語(yǔ)in the past half century可知,應(yīng)用現(xiàn)在完成時(shí)。
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