Jack had     feeling of excitement when hearing his article had been published inschool magazine．

A．the; a

B．a; the

C．/; the

D．the; /

甲在乙处加工西服两套，取回西服时因钱不够，未能付清加工费，乙只允许甲取走其中一套，称另一套等到甲将钱交清之后再取，乙对此套西服的占有基于()。

A．抵押

B．质权

C．留置权

D．所有权