33.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
人气：264 ℃ 时间：2019-10-18 22:46:28
解答
A.根据后文studied我们知道这是一个发生在过去的事实,而没有延续,所以不能选d.
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