---Have you seen Bob? He broke his arm at the weekend.---______ I'd heard he'd hurt himself but I thought it was just a few cuts and nothing too serious.A.Thanks for telling me.B.Oh no!C.No, I haven't.D.Yes, I have.
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B解析表示很惊诧的预期，“怎么会这样？”“我”还以为没什么大不了的．