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byhisteachers,hefeltnervous.[]A.HavingwatchedB.HavingbeenwatchingC.WatchingD.Beingwatched

题目详情
____ by his teachers, he felt nervous.  
[     ]    
A. Having watched      
B. Having been watching  
C. Watching  
D. Being watched
▼优质解答
答案和解析
D