“Where is Mother.” “She is in the kitchen. She _______ the housework all morning.”

A．is doing

B．was doing

C．has done

D．has been doing

下列不可以用于抵押个人抵押贷款的有( )。

A．抵押人所有的可以转让的基金份额

B．抵押人所有的房屋

C．抵押人所有的机器

D．抵押人所有的交通运输工具