1. 다음 중 대화가 어색한 것은?
① A : Are you sure about it?
B : Yes, I am.
② A : Can you tell me who was late for class?
B : Yes. It was Minsun.
③ A : Do you know who broke the window?
B : Oh, really?
④ A : February has 29 days next year.
B : Are you sure?
⑤ A : John won first prize in the contest.
B : How do you know about that?
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