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    精英家教网 > 高中英语 > 题目详情
    Surely Mr. Peterson ____ have forgotten to buy presents for his beloved family members. After all, it was Christmas!
    A．shouldn’tB．mustn’tC．can’tD．needn’t
    C
    考查情态动词。根据后面的句子，可知Peterson不可能忘记买礼物的，而must表推测不能用于否定句，故选C。
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