With all the books he was interested in _______, he left the library and went back to his dorm.

A．borrowed

B．borrowing

C．to borrow

D．borrow

在对CM2006系统客户档案信息维护更新时，对于新客户应在客户评级流程发起前将其基础档案维护完毕；对于老客户，应在其相关基础档案发生变化时及时（）系统档案资料。