◎ 题干
-How do you think he managed to improve his English in such a short time?
-______ four hours on it every day.
[     ]
A.Because of spending
B.To spend   
C.By spending
D.Spending 
◎ 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 do you think he managed to improve his English in such a short time?-______ four hours on it every day.[ ]A.Because of spendingB.To spendC.By spendingD.Spe…”主要考查了你对  【介词和介词短语】【动名词】  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。