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

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词组：句意：当遛狗的时候，你应该小心不要松了，否则对 陌生人会很危险。第一空填walking，while walking=while you are walking，第二空填get loose，get是连系动词，后面接形容词，选A。