I can't stand ________ with Jane in the same office. She just refuses__________ talking while she works.     [ ]

A. working ; stopping                

B. to  work ; stopping      

C. working; to stop                  

D. to work; to stop

如图运动员用头顶回远处飞来的足球，说明力可以改变物体的               ，同时他的头被撞得很疼，说明物体间力的作用是              。