问题
选择题
| While _____ the dog, you were careless and it got loose and was hit by a car. |
A. walking B. were walking C. walked D. to walk |
答案
答案：A
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| While _____ the dog, you were careless and it got loose and was hit by a car. |
A. walking B. were walking C. walked D. to walk |
答案：A