选什么:I must apologize for___ahead of time.(A)letting you not know(B)not letting you know(C)letting you know not(D)letting not you know

问题描述:

选什么:I must apologize for___ahead of time.
(A)letting you not know
(B)not letting you know
(C)letting you know not
(D)letting not you know

选B.
动名词的一般式的否定式是在动词前加not,not不能加在后面.