问题
选择题
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
答案
答案：D
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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
答案：D
