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 本题考查be said to do的用法。be said to do是固定结构,由句中的时间状语in the past year可知,动作发生在谓语动作之前,故应使用动词不定式的完成式作宾语,因此答案为[C]项。
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