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—I'm sorry about the misunderstanding.
—You _____ apologize, it wasn't your fault.
A、needn't
B、wouldn't
C、couldn't
D、mustn't
【正确答案】：A
【题目解析】：考查情态动词。句意：—关于这次误会我感到很抱歉。你没必要道歉，这不是你的错。needn't不必，没必要；wouldn't将不；couldn't不能；mustn't禁止，不能。