To save class time, our teacher has ______students do half of the exercises in class and complete the other half for homework.

A．us

B．we

C．our

D．ours

中央银行作为最后贷款人提供贷款，通常采取的形式包括( )

A．票据再贴现和票据再抵押

B．现金再贴现和现金再抵押

C．物资再贴现和物资再抵押

D．商品再贴现和商品再抵押