—Would you like to go bike ridding with me tomorrow?

—Sorry, I’m not         . I have to meet one of my friends at the train station.

A．impossible

B．full

C．available

D．traditional

“三检”是指在行车前、作业中和收车后对车辆进行的检查，其检查的重点是影响车辆安全运行的（）、（）、信号灯、牵引和举升等装置。