She has             a lot of things, so she knows exactly how to deal with such a person.

A．gone through

B．gone on

C．gone by

D．gone into

用钢笔在纸上写字时，笔尖跟纸之间的摩擦是_________摩擦；用圆珠笔在写字时，笔尖跟纸之间的摩擦是___________摩擦。