债务人或者第三人将其动产或权利移交债权人占有，将该动产作为债权的担保，称为( )。

A．物权
B．抵押
C．质押
D．留置

—I can’t find my pen. Could you lend me ______?    

—Sorry, I’m using it______.  [ ]

A. his; myself        

B. yours; by myself  

C. yourself; mine    

D. yours; myself