8、 China’s economic development has made         rapid progress in the past 30 years   and young people have made       great contribution to this progress.  

A.／；a     B. the；／    C. a；a      D.／；／  

8、A

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 China’s economic development has made         rapid progress in the past 30 years   and young people have made       great contribution to this progress.  

A.／；a     B. the；／    C. a；a      D.／；／  

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