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Professor Johnson is said some significant advance in his research in the past y

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Professor Johnson is said some significant advance in his research in the past y

Professor Johnson is said _____ somesignificant advance in his research in the past year.

A．having made

B．making

C．to have made

D．to make

 

试题答案

【答案】

C

【解析】略

 

标签：advancesignificanthisinsome

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