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19.The woman you saw at the park      be Jane.She is at work now.(  )
A.mustB.mightC.canD.can't

分析 你在公园看见的那个女人不可能是简,她现在正在工作.

解答 正确答案:D.情态动词must+动词原形,表示对现在情况的肯定推测,can't+动词原形则表示对现在情况的否定推测.根据题干She is at work now.可知简正在工作,所以在公园看见的那个女人不可能是她,则此处是对现在情况的一种否定推测,故选择D.at work表示在工作.

点评 本题考查情态动词表推测,基础题,掌握must与can与推测的用法及区别,再根据题干作出选择.

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