2. 外语
  3. Professor Johnson is said______some significant advance in his research in the past year.

Professor Johnson is said______some significant advance in his research in the past year.

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问题 Professor Johnson is said______some significant advance in his research in the past year.
选项 A、having made
B、making
C、to have made
D、to make
答案C
解析 非限定动词题。It is said to do表示“据说……”，不定式的完成式to have done表示不定式的动作先于谓语动词前完成，而本句中的“去年的研究取得重大进展”先于“据说”，因此[C]to have made为本题的正确答案。
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