—To protect animals in danger we should peoplethem .—I agree with you. A. ask to killB.

问题补充：

—To protect animals in danger ,we should peoplethem .

—I agree with you.

A. ask, to kill

B. to stop , to kill

C. stop , saving

D. stop , killing

答案：

A. ask, to kill

B. to stop , to kill

C. stop , saving

(答案→)D. stop , killing

解析：ask要求，问；stop停止，阻止；kill杀死，杀戮；save拯救，节省。句意：为了保护处于危险中的动物，我们应该阻止人们杀戮他们。结合语境可知选D。