【小鼻】評論
客戶被開帳單-被動，故用be p.p
【Chung Su】評論
glitch(n.)小故障，小差錯
【業精於勤，事立於豫】評論
It is unfortunate that, due to a glitch in the computer system, several of our most valued customers __________incorrectly. (不幸的是，由於電腦系統故障，一些我們最寶貴的客戶被收費錯誤。)(A) bill 收費(B) have billed 已收費(C) was billing 正在收費(D) were billed 被收費