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1.当某人对你说:“Excuse me.”时,你应说:“______”A.What? B.Yes? C.You're right. D.That's right. 2.当某人问你某事,你不知道时,应说:“______”A.Sorry,I don't know. B.Here you are. C.Who are you? D.That's OK. 3.当你想问某人能做某事时,你应说:“______”A.How do you do? B.What's this? C.