How much does he _____ the train ticket from Wuhan to Beijing?[ ]

A. cost

B. take

C. spend on

D. pay

某井于1510m处粘卡，钻头直径为215mm，钻杆外径127mm，壁厚9.19mm，原悬重为450kN。进行提拉操作时，由500kN上提到750kN，钻杆伸长了500mm，求卡点位置（K=715）。