【題目】—Congratulations！I hear you’ve won the first prize in the singing competition．—You _____ be mistaken．I’m in the dance class．

A．must B．may C．should D．could

【答案】A

【解析】Mistaken,adj．弄錯的，錯誤的。該句有強烈肯定的語氣，因此選Must。May和could表示可能，不符合

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