题目内容

【题目】—Look at the black hat. It must belong to Mr. King.
—No, it _______ be his. I saw an old man put it here just now.
A.mustn't
B.needn't
C.can't
D.won't

【答案】C
【解析】must表示确切判断“一定”时,反义词“一定不;不可能”用can't表示。所以答案是C

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