题目内容

33.[1999全国] Robert is said ________ abroad, but I don't know what country he studied in.

A. to have studied

B. to study

C. to be studying

D. to have been studying

 

答案:A
提示:

题目考察动词不定式作的完成式——不定式中的动作发生晚于谓语动作的发生

 


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