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
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
A
根据句中的 studied 可知，他曾到国外留过学，也就是说“留学”这个动作已结束并发生在谓语动作(is said)之前，故用完成式，即选 A。