She doesn’t ______ a new dictionary because she bought _____ a week ago.A.need to buy, oneB.need buy ,oneC.need to buy ,itD.need buy ,it
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A解析A 考查情态动词和代词。“她不必买一本新字典，因为她一周前买了一本了。”“不必”don’t need to do sth. = needn’t do sth. = don’t have to do sth.one指代可数名词，且泛指同类中的一个，it特指前文提到的那个，that指代不可数名词。这里是泛指一本字典，故用one。