问题
选择题
As a new driver, I have to practice _________the car in my small garage again and again. [ ]
A．to walk
B．walking
C. walked
D. having walked
答案
答案：B
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As a new driver, I have to practice _________the car in my small garage again and again. [ ]
A．to walk
B．walking
C. walked
D. having walked
答案：B