He is a student at Oxford University, _______ for a degree in computer science.
A. studied B. studying C. to have studied D. to be studying
He is a student at Oxford University, _______ for a degree in computer science.
A. studied B. studying C. to have studied D. to be studying
答案为B。现在分词做伴随状语，studying一词与其逻辑主语he 之间为主动关系，在本句中表示正在进行的动作。选项C为不定式的完成时，表示已经完成，不符合语境；选项D为不定式的进行时，表示将要进行，也不符合句意。