◎ 题干
The girl  _____ very fast around the track used to be very weak when she was a child.
[     ]
A. runs
B. ran
C. to run
D. running
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The girl _____ very fast around the track used to be very weak when she was a child.[ ]A. runsB. ranC. to run D. running…”主要考查了你对  【现在分词】  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。