单项选择题
A.在接受任命时有辱使命是对别人的不尊重。 B.不能准时赴约是对他人不尊重的表现。 C.不能如期接受任命表现了对别人的不尊重。 D.未能如期保持原来的约会安排是对他人的不尊重。
A. And B. Although C. However D. Until
A. has taught B. will be teaching C. has been teaching D. will have taught