The child must use a calculator when he does sums．The child couldn't do sums________a calculator．A.haven'tB.withC.there isn'tD.without
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D
解析分析：句意是“这孩子没有计数器就算不来了。”The child couldn't do sums里面的主语，谓语和宾语都有了，所以空格词不能用谓语结构，haven't和isn't都是谓语结构。with是介词，语法对，但意思不符合句子。without(没有)是介词，语法和意思都正确。