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―I'msorry,butsmokingisnotallowedinthissectiononthetrain...
问题详情:―I'msorry,butsmokingisnotallowedinthissectiononthetrain.―Oh,I__________that,andlwon'tagain.A.don'tknow B.didn'tknow C.won't D.haven'tknown【回答】B知识点:一般过去时及其被...