34. You had better not customers directly unless it is approved by the department.(A)contact (B) hav

問題詳情

34. You had better not customers directly unless it is approved by the department.
(A)contact
(B) have contacted
(C) contacting
(D) contacted

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增