While ____ the dog, you should take care not to get loose . Otherwise, it may be dangerous to strang...
2023-01-13 06:26:29 86次 2011-2012学年浙江省第一学期高二期中英语测试 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
While ____ the dog, you should take care
not to get loose . Otherwise, it may be dangerous to strangers.
|
A．walking;
|
B．walked
|
C．walking for
|
D．training for
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