Our enemy bills have been increasing steadily．     these costs，our telephone costs have doubled over the past six months．

A．Moreover

B．In addition to

C．As a result of

D．Contributing to

我国自然垄断行业和规模的管制改革，首先要()。

A．深化国企改革

B．治理行政性垄断

C．引入竞争机制

D．行政干预