问题
选择题
Robert is said ___________ abroad, but I don’t know what country he studied in .
A．to have studied
B．to be studying
C．to study
D．to have been studying
答案
答案：A
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Robert is said ___________ abroad, but I don’t know what country he studied in .
A．to have studied
B．to be studying
C．to study
D．to have been studying
答案：A