◎ 题干
Robert is said  _______ abroad, but I don't know what country he studied in.

A. to be studying    
B. to study  
C. to have studied    
D. to have been studying
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“Robert is said_______ abroad, but I don't know what country he studied in. [ ]A. to be studyingB. to study C. to have studiedD. to have been studying…”主要考查了你对  【不定式的完成式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。