does your car need the vehicle repair? - Every six months.A. How longB. How oftenC

问题补充：

--- does your car need the vehicle repair?

--- Every six months.

A. How long

B. How often

C. How soon

D. What time

答案：

A. How long

(答案→)B. How often

C. How soon

D. What time

解析：句意：你的车多久修理一次？每六个月。A 多长；B 多久一次；C 多快；D 什么时间；根据语境故选B。