While the dog you should take care not to .Otherwise it may be dangerous to strangers.A.

问题补充：

While the dog, you should take care not to .Otherwise, it may be dangerous to strangers.

A. walking; get loose

B. walk; be loose

C. walking for; get it loose

D. training; get it run

答案：

(答案→)A. walking; get loose

B. walk; be loose

C. walking for; get it loose

D. training; get it run

解析：考查状语从句的省略和固定搭配。动词walk溜…；本句中的walk the dog指遛狗；当状语从句的主语和主句主语一致，且状语从句中有be动词的时候，可以被状语从句的主语和be动词一起省略。Get loose松开；句意：当你在遛狗的时候，你要注意不要松开，否则对陌生人来说可能很危险。故A正确。