He likes to play a trick ________ me on the weekend and always begs me to ________ him for his

actions.[      ]

A. on; depend  

B. at; forgive

C. on; forgive  

D. with; excuse

进行滚动轴承寿命计算的目的是为了防止轴承（）。

A.过早点蚀 

B.过大塑性变形 

C.过早烧伤 

D.胶合