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withthestudiesofallhisstudentsMr.Johnsonwenttoschoolassoonashefinishedthemeeting.[]A.ConcerningB.ConcernedC.ToconcernD.Beingconcerned

题目详情
_____ with the studies of all his students Mr. Johnson went to school as soon as he finished the meeting.
[     ]
A. Concerning
B. Concerned
C. To concern
D. Being concerned
▼优质解答
答案和解析
B