Since she is out of work, Lucy________ going back to school, but she hasn’t decided yet.

A．had considered

B．has been considering

C．considered

D．is going to consider

我国政府采购的运行机制为（）。

A.委托采购与自行采购相结合

B.公开招标与非公开招标相结合

C.集中采购与分散采购相结合

D.以分散采购为主，集中采购为辅

E.以集中采购为主，分散采购为辅