The man is one of the best ______. He is _____ tasty dishes at the moment.  

A．cooks, cooks

B．cooks, cooking

C．cookers, cooking

D．cooking, cooking

( )是指材料自来源地运至工地仓库或指定堆放地点所发生的全部费用。

A．材料原价

B．材料运杂费

C．采购及保管费

D．运输损耗费