28、At the entrance all passengers _____ to show their tickets.
A. required B. are required C. require D. are requiring
科目：高中英語 來源： 題型：
At the entrance all passengers _____ to show their tickets.
A. required B. are required C. require D. are requiring
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權舉報專區(qū)
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com