Barack Obama delivered a speech to 500 local youths during his visit to China, many of fr

发布时间：2020-08-16 14:36:38

Barack Obama delivered a speech to 500 local youths during his visit to China, many of      from Fudan
University and Tongji University.
A. them
B. whom
C. which
D. who

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(答案→)A. them
B. whom
C. which
D. who
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