The bike my father bought me last week ___ him 200 yuan.

A．cost

B．costed

C．took

D．was paid by

列车编组计划的编制，应在加强（）的基础上，最大限度地组织成组、直达运输，合理分配各编组站、区段站的中转工作，减少列车改编次数。