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【题目】His uncle _______ have a ball.

A. doesn’t B. don’t C. isn’t D. aren’t

【答案】A

【解析】

句意:他叔叔没有一只球。由题干可知谓语动词have是实义动词所以变否定句要借助于助动词do的适当形式,而不能用be动词,所以排除C、D选项;do用于主语是第一人称、第二人称和第三人称复数形式的句子中,does用于主语是第三人称单数的句子中。本题中主语是第三人称单数His uncle,所以助动词选用does,其否定式在does后直接加not,缩写为doesn't;故答案选A。

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