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Surely Mr. Peterson ____ have forgotten...

 Surely Mr. Peterson ____ have forgotten to buy presents for his beloved family members. After all, it was Christmas!

A.shouldn’t

B.mustn’t

C.can’t

D.needn’t

 

C 【解析】 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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