Mr.Buchwald was working in his office when Michel stuck his head in.
(A) Michel bought Mr.Buchwald a drink.
(B) Michel knocked on Mr.Buchwald’s office door.
(C) Michel made a rude remark to Mr.Buchwald.
(D) Michel came into Mr.Buchwald’s office .

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統計： A(1), B(4), C(4), D(8), E(0) #781805