She is always ________ to help others at school and every other student wants to play

with her________.[      ]

A. willing; willing  

B. ready; willing

C. willing; willingly  

D. ready; ready

下列关于知识产权质押的论述中，正确的包括（）

A、出质人与质权人应当订立书面合同

B、应当分别向商标局、专利局、版权局办理出质登记

C、质押合同自双方签字之日起生效

D、质押合同自登记之日起生效