◎ 题干
---How long did it _____ you to work out the difficult maths problems?
---I ______ about half an hour on it .
A.take ; tookB.spend ; tookC.spend ; costD.take ; spent
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“---How long did it _____ you to work out the difficult maths problems?---I ______ about half an hour on it .A.take ; tookB.spend ; tookC.spend ; costD.take …”主要考查了你对  【实义动词的单数第三人称形式】【实义动词】【动词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。