A ___ bus sercice to the newairport started to operate two months ago.

问题描述:

A ___ bus sercice to the newairport started to operate two months ago.
A normalB usual C regular D common
我感觉CD都可以啊, 查牛津 都有普通的意思啊,在名词之前啊. dajia bang wo kan kangan ji bu jin a !
common 有 普通 的意思,大家也可以查字典看看

选C regular这里是说定时的 就是强调共交车是有班次的意思
而common只是说普通的 公共的
显然不是句子想表达的意思