16．We have made _______great progress in the medical field，but ______ progress we have made is not enough．（　　）
A．a； aB．a； theC．/； theD．/；/

分析 我們已經(jīng)在醫(yī)學(xué)領(lǐng)域取得巨大進(jìn)步，但我們?nèi)〉玫倪@些進(jìn)步還不夠．

解答 答案選C．第一空為固定搭配，make great progress，意為"取得巨大進(jìn)步"．第二空為特指，指代我們所取得的這些進(jìn)步，由其后的"we have made"修飾，故用定冠詞the．

點(diǎn)評 熟記常見搭配，make progress中不用冠詞．

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