________hasbeenprovedtobetruethat

发布时间：2020-07-10 20:02:25

________ has been proved to be true that China has made great rapid progress in every field．













A.That












B.As











C.Which











D.It

网友回答

D解析it在句子中作形式主语，真正的主语是that引导的句子。
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