______have you studied at this school?

问题描述:

______have you studied at this school?
A.How far B.How soon C.How long D.How often

how far 一般问路程“多远”
how soon 为(从现在起)再过多久,句子一般用将来时
how often 是问频率间隔多久(一次),频率吧
how long 是问(时间)“持续多久”,常与现在完成时或一般将来时连用
so C