—It seems that you are really suffering from a bad cold. How long have you been like this?

—Since last week. When the weather turned cold, I ________ more clothes.[ ]

A. haven't put on  

B. don't put on

C. hadn't put on  

D. didn't put on

连云港路桥中美合资企业委托江苏省机械设备进出口公司与美国卡耐基钢铁集团签约进口工程机械，并委托连云港外运公司代理报关，在填制进口报关单时，“经营单位”项应填：( )。

A．美国卡耐基钢铁集团

B．连云港外运公司

C．连云港路桥中美合资企业

D．江苏省机械设备进出口公司